Belt type air compressor structure beneficial to oil return

Abstract

The utility model relates to the field of automobile manufacturing, concretely relates to a belt type air compressor beneficial to oil return. The utility model discloses the setting of air compressor main support, oil return pipe joint, oil blanket and oil return mouth, the inside angle of air compressor main support is 84 DEG, the oil return mouth is horizontally inclined 6 DEG downward, makes the oil return mouth position level after installation, the oil return pipe joint is quick -plug type through -hole, and the pipe diameter is phi 20mm, the oil blanket adopts macromolecular composite material, the utility model adjusts air compressor crankcase oil return mouth angle, and uses quick -plug type's big -bore oil return pipeline, makes the oil return rate obvious promotion, and also more convenient on assembly, adopts macromolecular composite material (PTFE) oil blanket, and the strength and temperature resistance significantly promote, and the oil blanket sealed area designs helical line and axle rotation, and the rotating process produces the pumping effect to lubricating oil, forms good sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing, specifically to a belt-driven air compressor that facilitates oil return. Background Technology

[0002] Commercial vehicles and buses, due to their large load capacity, primarily use pneumatic braking systems. As the source of braking energy, the air compressor's component quality stability, ease of maintenance, and operating noise are crucial.

[0003] Currently, the two main types of structures on the market are belt drive and gear drive.

[0004] Gear transmission structure: The meshing noise of the gears is relatively large during operation. Since the air compressor is a part driven by the engine, it needs to work as long as the engine is running, continuously emitting operating noise. The gear structure is connected to the engine gear chamber, usually located at the lower end of the engine, making maintenance and disassembly difficult, and sometimes even requiring the entire engine assembly to be lifted for disassembly.

[0005] Existing belt-driven structures offer lower noise levels compared to gear structures, averaging 5dB lower. Driven by the engine crankshaft pulley and installed at the top of the engine, they are easy to install and remove. However, belt-driven structures have two major drawbacks: Firstly, the crankshaft front end has an oil seal, which is highly susceptible to failure and leakage due to the lateral forces from the pulley system. Secondly, because the installation is independent and not directly connected to the engine lubrication system, a dedicated oil return line needs to be designed. The existing oil return design has a low return rate and poor flow, causing oil to accumulate in the air compressor crankcase. This oil pressure, generated by crankshaft movement, impacts the oil seal, further exacerbating damage to the crankshaft front end oil seal. Utility Model Content

[0006] This invention proposes a belt-driven air compressor that facilitates backflow, maintaining the advantages of low noise and easy maintenance of belt-driven air compressors while solving the problem of high oil seal leakage failure rate. The specific technical solution is as follows:

[0007] A belt-driven air compressor structure that facilitates backflow includes a main air compressor support, an oil return pipe connector, an oil seal, and an oil return port. The main air compressor support has an inner angle of 84°, and the oil return port is horizontally inclined downwards at 6°, ensuring that the oil return port is horizontal after installation. The oil return pipe connector is a quick-connect type with a through-hole and a pipe diameter of Φ20mm. The oil seal is made of a planar polymer composite material.

[0008] Furthermore, the oil seal is made of PTFE material.

[0009] Furthermore, the sealing area of ​​the oil seal is provided with a spiral and a rotating shaft.

[0010] This invention adjusts the angle of the oil return port design in the air compressor crankcase to achieve a better result, and uses a quick-connect, large-diameter oil return pipeline, significantly improving the oil return rate and making assembly more convenient. The oil return pipeline adopts a quick-connect through-hole design, with a pipe diameter increased to Φ20mm. Bench and vehicle testing have shown that the oil return efficiency is doubled. The oil seal is made of high-polymer composite material (PTFE), and the sealing surface is a surface seal, unlike a line seal. Simultaneously, its strength and temperature resistance are significantly improved. The oil seal sealing area is designed with a spiral and shaft rotation; the rotation process generates a pumping effect on the lubricating oil, forming a good sealing effect. Attached Figure Description

[0011] Figure 1 This utility model presents a schematic diagram showing the positions of the main support frame and oil return port of the air compressor.

[0012] Figure 2 This utility model provides a schematic diagram showing the location of the crankcase oil return port.

[0013] Figure 3 Schematic diagram of the return oil pipe joint structure of this utility model;

[0014] Figure 4 Schematic diagram of the oil seal sealing area of ​​this utility model;

[0015] Figure 5 This utility model's oil seal sealing area pump suction principle diagram;

[0016] Figure 6 A schematic diagram of the location of the return oil port and the return oil pipe joint in the prior art. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1-3 As shown, a belt-driven air compressor structure facilitating backflow includes a main compressor support, an oil return pipe connector, an oil seal, and an oil return port. The main compressor support has an inner angle of 84°, and the oil return port is horizontally inclined downwards at 6°, ensuring a horizontal position after installation. The oil return pipe connector is a quick-connect type with a through-hole and a pipe diameter of Φ20mm. The oil seal is made of a high-polymer composite material. The oil seal is made of PTFE material, and the sealing area is designed as a surface. The sealing area of ​​the oil seal features a spiral line and a rotating shaft.

[0019] like Figure 4 and Figure 5As shown, the oil seal sealing area of ​​this invention is designed with a spiral and a rotating shaft. The rotation process generates a pumping effect on the lubricating oil, resulting in a good sealing effect. The blue part is the planar sealing area of ​​this invention with a spiral and rotating shaft.

[0020] This utility model adjusts the angle of the crankcase oil return port of the air compressor to a better design (such as...). Figure 6 As shown, the existing technology has an inward tilt of the oil return port due to the angle of the main support, which is not conducive to oil return. The new technology uses a quick-connect large-diameter oil return pipe, which significantly improves the oil return rate and makes assembly more convenient. The oil return pipe adopts a quick-connect through-hole design and the pipe diameter is increased to Φ20mm. After bench and vehicle testing, the oil return volume of the new technology's oil return pipe (method 2) and the existing technology's oil return pipe (method 1) are compared as shown in the table below. The oil return efficiency is doubled.

[0021]

[0022] The oil seal is made of high-polymer composite material (PTFE), and the sealing surface is a surface seal, which is different from a line seal. At the same time, the strength and temperature resistance are significantly improved. The oil seal sealing area is designed with a spiral and shaft rotation. During the rotation process, a pumping effect is generated on the lubricating oil, resulting in a good sealing effect.

[0023] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A belt-driven air compressor structure that facilitates oil return, characterized in that: The system includes a main support frame for the air compressor, an oil return pipe connector, an oil seal, and an oil return port. The main support frame has an inner angle of 84°, and the oil return port is tilted downwards at 6° to ensure a horizontal position after installation. The oil return pipe connector is a quick-connect type with a diameter of Φ 20mm. The oil seal is made of a surface-shaped polymer composite material.

2. The belt-driven air compressor structure facilitating oil return according to claim 1, characterized in that: The oil seal is made of PTFE.

3. The belt-driven air compressor structure facilitating oil return according to claim 1, characterized in that: The sealing area of ​​the oil seal is provided with a spiral and a rotating shaft.

Images