Engine oil seal air-tightness detection device

Abstract

An engine oil seal air-tightness detection device capable of realizing rapid, accurate, efficient and mass detection comprises a pressure head, an ejector block and an external floating piece. The ejector block is fixed between the output end of a cylinder and the pressure head, the bottom of the outer side of the pressure head is sleeved with a first O-shaped ring, the bottom surface of the pressure head is provided with a circle of convex edge, the convex edge is sleeved with a steel ring, and a second O-shaped ring is arranged in the gap between the steel ring and the convex edge. The floating piece comprises a sleeve shell and a partition plate located in the sleeve shell. A plurality of first reset springs are arranged between the partition plate and the upper surface of the pressure head. The partition plate divides the inner space of the sleeve shell into an upper portion and a lower portion, the pressure head is located at the lower portion of the sleeve shell, and the ejector block is located at the upper portion of the sleeve shell. A first closed space is formed between the ejector block and the partition plate. A first air inlet nozzle communicated with the first closed space is arranged on the ejector block. An air channel is arranged in the pressure head and comprises a second air inlet nozzle and an air outlet, the second air inlet nozzle is connected to an air tightness detector, and the air outlet is located between a warped edge and the convex edge.

Description

technical field [0001] The invention relates to a device for detecting the airtightness of an engine oil seal. Background technique [0002] See attached figure 1 And attached figure 2 shown, with figure 1 is a three-dimensional view of the oil seal assembly, attached figure 2 A cross-sectional view of the oil seal assembly. The engine oil seal, commonly known as the oil protection ring, is an indispensable part to keep the transmission parts in the car running normally. The main composition of the oil seal assembly is to press the oil retaining plate into the cover, and two joint surfaces are formed after the press fit: vertical direction The main bonding surface P and the press-fitting surface S in the horizontal direction, the press-fit airtightness between the two is mainly guaranteed by the main bonding surface P. Due to the difference in the manufacturing and processing precision of the cover and the oil retaining plate, the bonding degree of the main bonding su...

AI Technical Summary

Problems solved by technology

Due to the difference in the manufacturing and processing precision of the cover and the oil retaining plate, the bonding degree of the main bonding surface after pressing is also different. If the bonding degree is poor, oil leakage will occur during the engine working process.

For the tightness of the oil seal, some manufacturers ensure the tightness by applying high-temperature-resistant sealant to the corresponding position of the main bonding surface, and some manufacturers ensure the tightness by improving the processing accuracy of the oil retaining plate and the press-fitting surface of the cover. , but no matter which method is time-consuming and labor-intensive, it cannot fully guarantee the tightness of the oil seal, so it is necessary to test the tightness of the oil seal, and there is no good detection method at present

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