A diesel engine pressure relief structure
By installing a pressure relief structure at the diesel engine's oil drain port, including a plunger, spring, and plug, the problem of unstable lubricating oil output was solved, thus improving the lubrication effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HUAZAI POWER TECHNOLOGY CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-10
AI Technical Summary
In existing diesel engine lubrication systems, during startup, components such as the turbocharger, high-pressure oil pump, and air compressor have difficulty controlling the stable output of lubricating oil, resulting in poor lubrication performance.
A pressure relief structure, including a plunger, a spring, and a plug, is installed at the oil drain port of the diesel engine. It is connected to the oil drain port through a pressure relief channel and uses the spring force to regulate the oil pressure, ensuring a stable output of lubricating oil.
This achieves stability in lubricant output and improves lubrication performance.
Smart Images
Figure CN224478968U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of lubrication, and more specifically, to a pressure relief structure for a diesel engine. Background Technology
[0002] Currently, in diesel engine pressure relief structures, oil is pumped through the oil pump, cooler, and oil filter before entering the main oil passage. From there, it branches off to other components requiring lubrication. For example, patent CN206246173U discloses a pressure relief structure for an automotive diesel engine. In this structure, filtered lubricant is preferentially sent to the main oil passage, and then distributed to other subsystems.
[0003] Regarding the aforementioned related technologies, the inventors believe that the following defects exist: during the start-up process of components such as turbochargers, high-pressure oil pumps, and air compressors, it is difficult to control the stable output of lubricating oil. The lubricating oil output may switch between large and small due to changes in oil pressure, resulting in poor lubrication. Utility Model Content
[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.
[0005] To address the technical problems mentioned in the background section, some embodiments of this application provide a diesel engine pressure relief structure. The diesel engine has a drain port, characterized in that the pressure relief structure is disposed at the drain port: the pressure relief structure includes a plunger, a spring, and a plug; the plug seals the drain port; the diesel engine also has a drain passage and a pressure relief passage; the plunger is connected to the plug via the spring, and the plunger is disposed in the drain passage; the drain passage communicates with the pressure relief passage, and the pressure relief passage is located between the plunger and the plug.
[0006] Furthermore, the diesel engine also includes meshing internal teeth of the driving wheel and external teeth of the driven wheel; the pressure relief cavity intersects with the meshing position of the internal teeth of the driving wheel and the external teeth of the driven wheel.
[0007] Furthermore, the oil drain channel extends downward at an angle.
[0008] Furthermore, the discharge direction of the pressure relief cavity is parallel to the horizontal plane.
[0009] Furthermore, the spring is a compression spring.
[0010] Furthermore, the plug includes a housing and a plug core located inside the housing; the plug core is threadedly connected to the housing, and the housing is tightly sealed against the inner wall of the oil drain channel.
[0011] The beneficial effect of this application is that it ensures that the pressure in the oil discharge channel remains at a stable value. This, in turn, ensures a more stable oil output and better lubrication effect during the lubrication process. Attached Figure Description
[0012] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.
[0013] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.
[0014] In the attached diagram:
[0015] Figure 1 This is a schematic diagram illustrating the principle of an embodiment of this application.
[0016] Figure label:
[0017] 1. Plunger; 2. Spring; 3. Plug; 4. Oil drain passage; 5. Pressure relief passage; 6. Internal gear of the driving wheel; 7. External gear of the driven wheel. Detailed Implementation
[0018] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.
[0019] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.
[0020] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.
[0021] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".
[0022] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.
[0023] Reference Figure 1 ,
[0024] A pressure relief structure for a diesel engine, the diesel engine having a drain port, characterized in that the pressure relief structure is disposed at the drain port. The pressure relief structure includes a plunger 1, a spring 2, and a plug 3; the plug 3 seals the drain port, and the diesel engine further includes a drain passage 4 and a pressure relief passage 5; the plunger 1 is connected to the plug 3 via the spring 2, and the plunger 1 is disposed in the drain passage 4; the drain passage 4 communicates with the pressure relief passage 5, and the pressure relief passage 5 is located between the plunger 1 and the plug 3. The plunger 1 is used to prevent oil from overflowing, but as the oil pressure in the drain passage 4 gradually increases, it is necessary to relieve the oil pressure. As the oil pressure increases, the oil pushes the plunger 1 to move, connecting the pressure relief passage 5 with the drain passage 4, and then the oil will leak out through the pressure relief passage 5, better ensuring that the pressure in the drain passage 4 remains at a stable value. This ensures that the lubrication system delivers a more stable amount of oil and achieves better lubrication during the lubrication process.
[0025] Specifically, the diesel engine also includes meshing internal teeth 6 of the driving wheel and external teeth 7 of the driven wheel; the pressure relief chamber 5 intersects with the meshing position of the internal teeth 6 of the driving wheel and the external teeth 7 of the driven wheel. The oil discharged outward from the pressure relief chamber 5 can lubricate parts of the internal teeth 6 of the driving wheel and the external teeth 7 of the driven wheel.
[0026] Specifically, the oil drain channel 4 extends downward at an angle. The discharge direction of the pressure relief channel 5 is parallel to the horizontal plane.
[0027] Specifically, the spring 2 is a compression spring 2.
[0028] Specifically, the plug 3 includes a housing and a plug core located inside the housing; the plug core is threadedly connected to the housing, and the housing is tightly sealed against the inner wall of the oil drain channel 4. By rotating the plug core, the plug core moves relative to the housing, thereby moving the plug core within the oil drain channel 4. The plug core compresses the spring 2, thereby increasing the elastic force between the spring 2 and the plunger 1, thus adjusting the pressure relief force, or, after the spring 2 has aged, rotating the plug core can maintain the normal operation of the spring 2.
[0029] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.
Claims
1. A diesel engine pressure relief structure, wherein the diesel engine has an oil drain port, characterized in that, A pressure relief structure is provided at the oil drain port: the pressure relief structure includes a plunger, a spring, and a plug; The plug seals the oil drain port, and the diesel engine also has an oil drain passage and a pressure relief passage; the plunger is connected to the plug via the spring, and the plunger is disposed in the oil drain passage; The oil draining channel is connected to the pressure relief channel, which is located between the plunger and the plug.
2. The diesel engine pressure relief structure according to claim 1, characterized in that: The diesel engine also includes meshing internal teeth of the driving gear and external teeth of the driven gear; The pressure relief cavity intersects with the meshing position of the internal teeth of the driving wheel and the external teeth of the driven wheel.
3. The diesel engine pressure relief structure according to claim 1, characterized in that: The oil draining channel extends downward at an angle.
4. The diesel engine pressure relief structure according to claim 1, characterized in that: The discharge direction of the pressure relief cavity outlet is parallel to the horizontal plane.
5. The diesel engine pressure relief structure according to claim 1, characterized in that: The spring is a compression spring.
6. The diesel engine pressure relief structure according to claim 1, characterized in that: The blockage includes a housing and a plug core located inside the housing; the plug core is threadedly connected to the housing, and the housing is tightly sealed against the inner wall of the oil drain channel.