Engine piston cooling nozzle

Abstract

The utility model discloses an engine piston cooling nozzle. The nozzle is used for spraying lubricating oil and comprises a nozzle body, a main spraying pipe is communicated with the side edge of the nozzle body, an auxiliary spraying pipe is further communicated with the side edge of the nozzle body, the spraying direction of the main spraying pipe faces an inner cooling oil channel of an engine piston, the spraying direction of the auxiliary spraying pipe faces a thrust shoe, and the inner diameter of the main spraying pipe is larger than that of the auxiliary spraying pipe. Due to the fact that the main spray pipe and the auxiliary spray pipe which are different in spray direction and spray capacity are arranged, most lubricating oil in the spray nozzle body enters an inner cooling oil way of an engine piston through the main spray pipe, and the piston is cooled through an oscillation cooling method. And a small part of residual lubricating oil in the nozzle body is aligned to the thrust shoe through the auxiliary spray pipe and enters a matching surface between the thrust shoe and the crankshaft to lubricate. According to the utility model, not only is the quick abrasion of the thrust shoe on the engine improved, but also the cooling effect of the middle part of the piston is improved, and the risks of thermal cracking, melting and jamming of the piston are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an engine piston cooling nozzle. Background Art

[0002] In the prior art, piston cooling nozzles are commonly used to force-cool engine pistons. These nozzles inject lubricating oil into the piston's cooling oil passages at a certain pressure, causing the oil to flow through the passages and cool the piston. Alternatively, they spray the oil directly onto the bottom of the piston, using a splashing action to cool and lubricate the piston.

[0003] However, as engines become increasingly powerful and market demands become increasingly stringent, continuing to use conventional piston cooling nozzles to cool the pistons presents the following problems: the mating surfaces between the thrust pads and the crankshaft on the engine are susceptible to accelerated wear due to high-intensity friction and large axial forces, leading to reduced engine performance. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the utility model proposes an engine piston cooling nozzle, which avoids the risks of piston thermal cracking, melting and sticking while ensuring the cooling effect of the middle part of the piston, and at the same time improves the rapid wear of the thrust pad on the engine.

[0005] In order to achieve the above-mentioned purpose, the utility model is designed to provide an engine piston cooling nozzle for spraying lubricating oil, including a nozzle body, the side of which is connected to a main nozzle. The special feature of the nozzle body is that the side of the nozzle body is also connected to an auxiliary nozzle, the injection direction of the main nozzle is toward the internal cooling oil channel of the engine piston, and the injection direction of the auxiliary nozzle is toward the thrust washer, and the inner diameter of the main nozzle is larger than the inner diameter of the auxiliary nozzle.

[0006] Furthermore, the nozzle body is connected with a hollow bolt, and the hollow bolt is connected to a lubricating oil pipeline.

[0007] Furthermore, a positioning pin is fixed on the nozzle body for preventing the nozzle body from rotating relative to the lubricating oil pipeline.

[0008] Furthermore, the injection port of the main nozzle is provided with a constriction for controlling the flow rate.

[0009] The advantages of the present invention are:

[0010] 1. The present invention provides a main nozzle and auxiliary nozzle with different spray directions and spray capacities. Most of the lubricating oil in the nozzle body enters the internal cooling oil channel of the engine piston through the main nozzle, and cools the piston through an oscillating cooling method, thereby avoiding the risk of thermal cracking and melting of the piston. The remaining small amount of lubricating oil in the nozzle body is directed to the thrust pad through the auxiliary nozzle and enters the mating surface between the thrust pad and the crankshaft for lubrication, thereby reducing abnormal wear of the thrust pad and avoiding the risk of piston seizure.

[0011] 2. The present invention not only utilizes the cooling function of the lubricating oil, but also utilizes its lubricating and anti-friction function. That is, while most of the lubricating oil ejected through the main nozzle cools the piston, a small portion of the lubricating oil ejected through the auxiliary nozzle lubricates the mating surface between the thrust bearing and the crankshaft, thus achieving a reasonable layout within the narrow space of the engine.

[0012] The utility model discloses an engine piston cooling nozzle, which can avoid the risk of thermal cracking, melting and seizure of the piston while ensuring the cooling effect of the middle part of the piston, and improves the rapid wear of the thrust shoe on the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the engine piston cooling nozzle of the utility model;

[0014] Figure 2 This is a schematic diagram of the relative positions of the piston cooling nozzle, the internal cooling oil channel, and the thrust shoe in the present invention;

[0015] Figure 3 This is a schematic diagram of the relative positions of the piston cooling nozzle and the connecting rod in the present invention;

[0016] In the figure: piston cooling nozzle 100, internal cooling oil channel 200, thrust washer 300, connecting rod 400, crankshaft 500;

[0017] The piston cooling nozzle 100 includes: a nozzle body 1, a positioning pin 2, a hollow bolt 3, a main nozzle 4, and an auxiliary nozzle 5;

[0018] The main nozzle 4 includes a constriction 4 - 1 . DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. In the description of the present invention, it should be understood that the terms "length," "width," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0020] like Figure 1 As shown, the utility model is an engine piston cooling nozzle 100 for spraying lubricating oil, comprising a nozzle body 1, wherein the side of the nozzle body 1 is connected to a main nozzle 4, and the side of the nozzle body 1 is also connected to an auxiliary nozzle 5. The spraying direction of the main nozzle 4 is toward the internal cooling oil channel 200 of the engine piston, and the spraying direction of the auxiliary nozzle 5 is toward the thrust washer 300. The inner diameter of the main nozzle 4 is larger than the inner diameter of the auxiliary nozzle 5.

[0021] The inner diameter of the main nozzle 4 is larger than that of the auxiliary nozzle 5 , thereby ensuring that the spraying capacity of the main nozzle 4 is greater than that of the auxiliary nozzle 5 , so that more lubricating oil enters the main nozzle 4 rather than the auxiliary nozzle 5 through the nozzle body 1 .

[0022] After the engine piston cooling nozzle 100 of the utility model is installed in place, please refer to Figure 2 Most of the lubricating oil in the nozzle body 1 enters the internal cooling oil channel 200 of the engine piston through the main nozzle 4, and cools the piston through the vibration cooling method, avoiding the risk of thermal cracking and melting of the piston; the remaining small amount of lubricating oil in the nozzle body 1 is directed to the thrust washer 300 through the auxiliary nozzle 5, and enters the mating surface between the thrust washer 300 and the crankshaft 500 for lubrication, improving abnormal wear of the thrust washer 300 and avoiding the risk of piston seizure.

[0023] Preferably, the main nozzle 4 and the auxiliary nozzle 5 are both connected to the nozzle body 1 by brazing.

[0024] The utility model utilizes not only the cooling function of the lubricating oil but also the lubricating and anti-friction function of the lubricating oil by arranging the main nozzle 4 and the auxiliary nozzle 5 with different spraying directions and spraying capabilities.

[0025] Specifically, the nozzle body 1 is connected to a hollow bolt 3, which is connected to a lubricating oil pipeline. Preferably, one end of the hollow bolt 3 is connected to the inner cavity of the nozzle body 1, and the other end is threadedly connected to the lubricating oil pipeline. Lubricating oil flows from the hollow bolt 3 to the nozzle body 1 and is then diverted through the nozzle body 1 to the main nozzle 4 and auxiliary nozzle 5.

[0026] Preferably, a locating pin 2 is fixed to the nozzle body 1 to prevent the nozzle body 1 from rotating relative to the lubricating oil pipeline. Once the nozzle body 1 is properly connected to the lubricating oil pipeline, the locating pin 2 preferably ensures accurate positioning of the engine piston cooling nozzle to prevent the nozzle body 1 from rotating relative to the lubricating oil pipeline. Preferably, the locating pin 2 is connected to the nozzle body 1 by brazing.

[0027] The injection port of the main nozzle 4 is provided with a constriction 4 - 1 for controlling the flow rate.

[0028] like Figure 3 As shown, since the main nozzle 4 is located near the outside of the cylinder, it is less likely to interfere with the connecting rod 400, which is also for the convenience of processing and saving manufacturing costs. In addition, since the auxiliary nozzle 5 is aligned with the thrust washer 300, the pipe shape of the auxiliary nozzle 5 is designed according to the layout requirements to avoid the connecting rod 400 and other moving parts. Therefore, the piston cooling nozzle 100 is generally designed as a three-dimensional structure. Please refer to Figure 1 .

[0029] The engine piston cooling nozzle of the utility model not only improves the rapid wear of the thrust shoe on the engine, but also improves the cooling effect of the middle part of the piston, avoiding the risks of thermal cracking, melting and seizure of the piston.

[0030] The above embodiments are preferred implementation methods of the present invention, but the implementation methods of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. An engine piston cooling nozzle for injecting lubricating oil, comprising a nozzle body (1), wherein the side of the nozzle body (1) is connected to a main nozzle (4), and characterized in that: The side of the nozzle body (1) is also connected to an auxiliary nozzle (5); the spray direction of the main nozzle (4) is toward the internal cooling oil channel (200) of the engine piston, and the spray direction of the auxiliary nozzle (5) is toward the thrust washer (300); the inner diameter of the main nozzle (4) is larger than the inner diameter of the auxiliary nozzle (5).

2. The engine piston cooling nozzle according to claim 1, characterized in that: The nozzle body (1) is connected to a hollow bolt (3), and the hollow bolt (3) is connected to a lubricating oil pipeline.

3. The engine piston cooling nozzle according to claim 2, characterized in that: A positioning pin (2) is fixed on the nozzle body (1) for preventing the nozzle body (1) from rotating relative to the lubricating oil pipeline.

4. The engine piston cooling nozzle according to claim 3, characterized in that: The injection port of the main nozzle (4) is provided with a constriction (4-1) for controlling the flow rate.

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