Rotary Pumping Ring Mechanical Seal for Compact Cooling
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Solution Overview
Problem
Conventional mechanical seal devices are bulky due to the need for a thick axial section to accommodate a pumping bore, leading to inefficient cooling and increased wear from solid content exposure, especially when used in applications with rigid beads or powders.
Innovation Solution
A mechanical seal device with a rotary type external seal and a pumping ring that forms a fluid passage between the inner and outer seal devices, allowing for efficient cooling without the need for an angled pumping bore, and utilizing non-metallic materials to reduce wear, with a cartridge design that minimizes size and exposure to solid content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional mechanical seal device uses a static type external seal with a pumping bore, then the seal device can cool the sliding faces, but the axial section becomes thick and the device becomes bulky
Solution Approach 1:
The invention inverts the conventional configuration by making the external seal rotary type instead of static type. The pumping ring is integrated with the rotary ring, allowing the pumping bore to be formed in the rotating component rather than the stationary case. This inversion enables the cooling function to be achieved without increasing the axial thickness of the stationary seal case.
Solution Approach 2:
The invention merges the pumping ring with the rotary ring into a single integrated component. The pumping bore is formed directly in the rotary ring, combining the sealing and pumping functions in one element. This integration eliminates the need for a separate pumping structure that would increase axial thickness.
2Reliability
If a conventional mechanical seal device uses a thick axial section to accommodate the pumping bore, then the cooling function is provided, but the device size increases and wear from solid content exposure increases
Solution Approach 1:
By inverting the configuration and placing the pumping bore in the rotary ring rather than the stationary case, the invention reduces the axial thickness of the stationary seal case. This reduction in thickness decreases the exposure area to solid content in the sealed fluid, thereby reducing wear from particles and beads.
3Device complexity
If a conventional mechanical seal device uses a static type external seal, then the structure is simple, but the device becomes bulky and cooling efficiency is reduced
Solution Approach 1:
The invention maintains structural simplicity by using a standard rotary ring and stationary ring configuration, but inverts which component contains the pumping bore. The pumping bore in the rotary ring achieves the same cooling function with a more compact overall device volume.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution results in a smaller, more efficient mechanical seal device with enhanced cooling performance and increased abrasion resistance, suitable for applications involving powders and rigid beads, by using a rotary type external seal and non-metallic materials to prevent wear and exposure.
Implementation Method 1
a pumping ring (80) to perform pumping effect so that a quenching liquid supplied to an intermediate chamber (73) flows in the intermediate chamber (73)
Implementation Method 2
the quenching liquid in the intermediate chamber 273 is flown along the pumping bore 253. As a result, a flow passage of the quenching liquid, in which the quenching liquid is supplied from the supplying bore 271 and discharged from the outlet bore 272 through the intermediate chamber 273, is formed, so that the internal side mechanical seal device 230, the external side mechanical seal device 250, and the sliding faces thereof are cooled
Implementation Method 3
the fluid (quenching liquid) in the intermediate chamber 273 is flown along the pumping bore 253
Data Source
Figure 1
Figure 2
AI summary
The present invention provides a small sized mechanical seal device which is available to perform cooling efficiently and having high anti-abrasion property. In a mechanical seal device of the present invention, a fluid supplied from a cooling fluid supplying bore 71 passes through an intermediate chamber 73 and introduced into an inside of a cylindrical section 82 of a collar 80 from a port 83 of a back face section 81 of the collar 80 as a pumping ring 80. In the collar 80, the cooling fluid equally flows in a space between an inner circumferential face of the cylindrical section 82 and an outer circumferential section of a rotary ring 51, also flows to near a sliding face of an external side mechanical seal device 50. The cooling fluid in the collar 80 is derived from a discharge port 84 which is formed on the cylindrical section 82 and the cooling fluid is discharged via an outlet bore 72.