Cooling device for single-cylinder diesel engine
By introducing a combination of sealing plates and blocking rings into the cooling device of a single-cylinder diesel engine, the one-way water inlet and high-temperature steam are effectively blocked, solving the problems of frequent water replenishment and scalding in evaporative water-cooling structures, and improving safety and cooling efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN CEMENTHAI MACHINERY CO LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-06-05
AI Technical Summary
The existing evaporative water-cooling structure of single-cylinder diesel engines has a fast cooling water evaporation rate under high-temperature conditions, requiring frequent water replenishment, and there is a risk of scalding during the water replenishment process.
A cooling device comprising a water jacket, a safety adding mechanism, and a guiding component was designed. By utilizing the cooperation of a sealing plate and a blocking ring, water can be introduced in one direction through gravity and steam pressure, preventing the leakage of high-temperature steam. The guiding component reduces the risk of scalding and ensures sealing performance and vibration stability.
It effectively prevents high-temperature steam from leaking out, reduces the risk of burns, improves the safety of water replenishment, maintains cooling efficiency, and extends the service life of diesel engines.
Smart Images
Figure CN224326331U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of diesel engine technology, and in particular to a cooling device for a single-cylinder diesel engine. Background Technology
[0002] Single-cylinder diesel engines, as a type of simplified internal combustion engine, are characterized by a single-cylinder configuration. Power output is achieved through the compression ignition of diesel fuel within the combustion chamber. Current mainstream models generally employ an evaporative water-cooling structure as their thermal management solution. The operating mechanism of this system is as follows: the cooling medium (usually water) absorbs heat within the water jacket surrounding the cylinder and then vaporizes, dissipating heat through the exhaust of the steam.
[0003] Although evaporative cooling systems eliminate the need for mechanical water pumps, the rapid evaporation rate of cooling water under high-temperature conditions necessitates frequent manual water replenishment. Furthermore, during water replenishment, saturated steam in the water tank can splash through the water inlet, posing a risk of scalding. Utility Model Content
[0004] Therefore, it is necessary to provide a cooling device for a single-cylinder diesel engine to address the significant safety hazards that arise when replenishing the cooling medium in a single-cylinder diesel engine cooling device.
[0005] A cooling device for a single-cylinder diesel engine includes a water jacket and a safety filling mechanism. The top of the water jacket is fixedly connected to and communicates with a water tank. A tank cover is snapped into the top of the water tank, and a filling hole is provided on the top of the tank cover.
[0006] In one embodiment, the safety adding mechanism includes a funnel fixedly connected to the inside of the adding hole. A blocking ring and a hollow frame are fixedly connected to the inner side of the funnel from top to bottom. A guide rod is slidably connected inside the hollow frame. A spring is provided at the bottom of the guide rod to contact the hollow frame. A sealing plate is fixedly connected at the top of the guide rod to contact the blocking ring.
[0007] In one embodiment, the vertical cross-sectional shape of the inner side of the blocking ring is an inverted isosceles trapezoid, the diameter of the sealing plate is larger than the inner diameter of the lower opening of the blocking ring, and the diameter of the sealing plate is smaller than the minimum inner diameter of the funnel.
[0008] In one embodiment, the cross-sectional shape inside the hollow frame is convex, the cross-sectional shape of the guide rod is inverted T-shaped, and the maximum diameter of the guide rod inside the hollow frame is greater than the inner diameter of the opening of the hollow frame.
[0009] In one embodiment, the safety adding mechanism further includes a guiding component, which includes a threaded sleeve fixedly connected to the outside of the funnel, a threaded seat being threadedly connected inside the threaded sleeve, and an n-shaped rod slidably connected to the threaded sleeve on the inner side of the threaded seat, one end of the n-shaped rod passing through the threaded sleeve and fixedly connected to a sealing sheet.
[0010] In one embodiment, the top of the threaded seat is provided with a sliding cavity, and an anti-detachment block that is fixedly connected to the n-shaped rod is slidably connected inside the sliding cavity.
[0011] In one embodiment, the maximum height to which the anti-detachment block slides inside the sliding cavity is greater than the maximum height to which the threaded seat penetrates into the threaded sleeve, and the bottom of the anti-detachment block contacts the inner bottom wall of the sliding cavity.
[0012] In one embodiment, an adjusting ring is fixedly connected to the bottom of the threaded seat, and the corners of the adjusting ring are rounded.
[0013] Beneficial effects
[0014] The cooling device for the aforementioned single-cylinder diesel engine, through the cooperation of the sealing plate and the blocking ring of the safety adding mechanism, relies on the gravity of the water to overcome the spring force and steam pressure to achieve one-way water intake during water replenishment, effectively preventing the leakage of high-temperature steam from the water tank; the adjustment ring and n-shaped rod design of the guide component keep the operator's hands away from the center of the funnel, reducing the risk of burns and improving the safety of water replenishment.
[0015] The threaded connection between the threaded sleeve and the threaded seat is matched with the anti-dislodgement block to ensure that vibration during diesel engine operation will not cause the sealing plate to shift, maintain the continuous sealing of the retaining ring against high-temperature steam, ensure the heat exchange efficiency of the cooling water jacket, and extend the service life of the diesel engine. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a schematic diagram of a partial structure in this utility model;
[0019] Figure 3 This is a cross-sectional schematic diagram of a partial structure in this utility model;
[0020] Figure 4for Figure 3 Enlarged view of point A in the middle;
[0021] Figure 5 This is an exploded view of a partial structure of this utility model.
[0022] Figure label:
[0023] 100. Water jacket; 200. Water tank; 300. Tank cover; 310. Adding hole; 400. Safety adding mechanism; 410. Funnel; 420. Blocking ring; 430. Hollow frame; 440. Guide rod; 450. Spring; 460. Sealing plate; 470. Guide assembly; 471. Threaded sleeve; 472. Threaded seat; 473. N-shaped rod; 474. Sliding cavity; 475. Anti-detachment block; 476. Adjusting ring. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.
[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0027] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0028] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.
[0029] The following is combined Figures 1-5 This invention describes a cooling device for a single-cylinder diesel engine.
[0030] In one embodiment, a cooling device for a single-cylinder diesel engine includes a water jacket 100 and a safety filling mechanism 400. The top of the water jacket 100 is fixedly connected to and communicates with a water tank 200. A tank cover 300 is snapped into the top of the water tank 200. A filling hole 310 is provided on the top of the tank cover 300. When the user needs to add water to the water tank 200 while the engine is stopped, the user only needs to remove the tank cover 300 in the existing manner and then quickly add water to the hole exposed on the top of the water tank 200.
[0031] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the safety adding mechanism 400 includes a funnel 410 fixedly connected inside the adding hole 310. A blocking ring 420 and a perforated frame 430 are fixedly connected sequentially from top to bottom on the inner side of the funnel 410. A guide rod 440 is slidably connected inside the perforated frame 430. A spring 450 is provided at the bottom of the guide rod 440, contacting the perforated frame 430. A sealing plate 460 is fixedly connected at the top of the guide rod 440, contacting the blocking ring 420. The vertical cross-sectional shape of the inner side of the blocking ring 420 is an inverted isosceles trapezoid. The diameter of the sealing plate 460 is larger than the inner diameter of the lower opening of the blocking ring 420, and smaller than the minimum inner diameter of the funnel 410. The cross-sectional shape inside the perforated frame 430 is convex, and the cross-sectional shape of the guide rod 440 is an inverted T-shape. The maximum diameter of the guide rod 440 inside the perforated frame 430 is larger than the inner diameter of the opening of the perforated frame 430.
[0032] In this embodiment, the user can pour water into the funnel 410. The water is blocked from flowing down the funnel 410 by the sealing plate 460 and the blocking ring 420. When the weight of the water is greater than the elastic force of the spring 450 and the pressure of the high-temperature steam in the water tank 200, the water can press down the sealing plate 460. Then the water flows down through the gap between the sealing plate 460 and the blocking ring 420 and re-enters the water tank 200 along the funnel 410, completing the water replenishment operation of the water tank 200. This can unidirectionally prevent the high-temperature steam in the water tank 200 from being discharged to the outside, thereby reducing the safety hazards of water replenishment during the operation of the cooling device for the single-cylinder diesel engine.
[0033] like Figure 3 , Figure 4 and Figure 5 As shown, the safety adding mechanism 400 also includes a guide assembly 470, which includes a threaded sleeve 471 fixedly connected to the outside of the funnel 410. A threaded seat 472 is threadedly connected inside the threaded sleeve 471. An n-shaped rod 473, which is slidably connected to the threaded sleeve 471, is slidably connected to the inner side of the threaded seat 472. One end of the n-shaped rod 473 passes through the threaded sleeve 471 and is fixedly connected to the sealing plate 460. A sliding cavity 474 is provided at the top of the threaded seat 472. An anti-detachment block 475, which is fixedly connected to the n-shaped rod 473, is slidably connected inside the sliding cavity 474. The maximum height to which the anti-detachment block 475 slides inside the sliding cavity 474 is greater than the maximum height to which the threaded seat 472 penetrates into the threaded sleeve 471. The bottom of the anti-detachment block 475 contacts the inner bottom wall of the sliding cavity 474. An adjusting ring 476 is fixedly connected to the bottom of the threaded seat 472. The corners of the adjusting ring 476 are rounded.
[0034] In this embodiment, when the user needs to unlock the sealing plate 460, the user only needs to rotate the adjusting ring 476 in the corresponding direction. The adjusting ring 476 drives the threaded seat 472 to rotate out the threaded sleeve 471, and then the user can pour water into the funnel 410.
[0035] When the water at the end of the water replenishment stage cannot push open the sealing plate 460, the user can actively pull down the adjusting ring 476. The adjusting ring 476 drives the sealing plate 460 to move down actively through the threaded seat 472, the sliding cavity 474, the anti-detachment block 475 and the n-shaped rod 473, so that the water can flow smoothly down through the gap between the sealing plate 460 and the blocking ring 420. During this process, the user's hand is on the side of the funnel 410, which can effectively reduce the probability of the user being scalded by leaked high-temperature steam, thereby improving the safety factor of the user's water replenishment.
[0036] When the water replenishment is finished, the user only needs to screw the threaded seat 472 back into the threaded sleeve 471 through the adjusting ring 476. When the threaded seat 472 and the threaded sleeve 471 are connected in place, the bottom of the anti-detachment block 475 abuts against the sliding cavity 474. The anti-detachment block 475 prevents the sealing plate 460 from moving down through the n-shaped rod 473. This can prevent the sealing plate 460 from being displaced during the vibration of the single-cylinder diesel engine, so as to ensure that the blocking ring 420 and the sealing plate 460 can effectively prevent the leakage of high-temperature steam.
[0037] Extended content: Single-cylinder diesel engines with evaporative water cooling structure include, but are not limited to, the following structures:
[0038] I. Cylinder System
[0039] Cylinder block: The skeleton of the engine, with cylinder liners inside, which is the core cavity of the combustion chamber. The water jacket 100 is fixedly connected to the upper part of the cylinder block.
[0040] Cylinder head: It seals the top of the cylinder and integrates the injector mounting hole, intake and exhaust valve passages, and cooling water passages. The inlet and outlet of the cooling water passages are connected to the water jacket 100.
[0041] Piston: It reciprocates inside the cylinder, bears the pressure of the combustion gas at the top, and is connected to the connecting rod through the piston pin.
[0042] Crank-connecting rod mechanism: The connecting rod connects the piston and the crankshaft, converting the linear motion of the piston into the rotational motion of the crankshaft; it is the core shaft for outputting power from the crankshaft, with a flywheel at the end to store inertial energy for smooth operation; and it uses bearings and bushings to support the rotation of the crankshaft.
[0043] II. Gas Distribution and Fuel System
[0044] Valve train: The camshaft drives the tappets and rocker arms to control the opening and closing timing of the intake and exhaust valves, thus realizing the air exchange process.
[0045] Fuel supply system: It uses injectors mounted on the cylinder head to inject atomized diesel fuel into the combustion chamber under high pressure.
[0046] High-pressure fuel pump: provides precise fuel pressure; some models integrate a governor to control the amount of fuel injected.
[0047] III. Auxiliary Systems:
[0048] Lubrication system: An oil pump pumps oil from the oil pan, which is then delivered to friction pairs such as crankshaft bearings, connecting rods, and camshafts via a filter; lubrication methods include splash lubrication and pressure lubrication.
[0049] Start-up and emission system: Start-up relies on a starter motor or hand crank to drive the flywheel gear ring; exhaust gas is discharged after being treated by the exhaust pipe and muffler.
[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0051] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.
Claims
1. A cooling device for a single-cylinder diesel engine, characterized in that, include: A water jacket (100) is fixedly connected to and communicates with a water tank (200) at its top. A tank cover (300) is snapped into the top of the water tank (200). An addition hole (310) is provided on the top of the tank cover (300). A safety adding mechanism (400) includes a funnel (410) fixedly connected inside the adding hole (310). A blocking ring (420) and a hollow frame (430) are fixedly connected from top to bottom on the inner side of the funnel (410). A guide rod (440) is slidably connected inside the hollow frame (430). A spring (450) is provided at the bottom of the guide rod (440) and contacts the hollow frame (430). A sealing plate (460) is fixedly connected at the top of the guide rod (440) and contacts the blocking ring (420).
2. The cooling device for a single-cylinder diesel engine according to claim 1, characterized in that, The vertical cross-sectional shape of the inner side of the blocking ring (420) is an inverted isosceles trapezoid. The diameter of the sealing plate (460) is greater than the inner diameter of the lower opening of the blocking ring (420), and the diameter of the sealing plate (460) is less than the minimum inner diameter of the funnel (410).
3. The cooling device for a single-cylinder diesel engine according to claim 1, characterized in that, The cross-sectional shape inside the hollow frame (430) is convex, and the cross-sectional shape of the guide rod (440) is inverted T-shaped. The maximum diameter of the guide rod (440) inside the hollow frame (430) is greater than the inner diameter of the opening of the hollow frame (430).
4. The cooling device for a single-cylinder diesel engine according to claim 1, characterized in that, The safety adding mechanism (400) further includes a guide assembly (470), which includes a threaded sleeve (471) fixedly connected to the outside of the funnel (410). The threaded sleeve (471) is internally threaded with a threaded seat (472). The inner side of the threaded seat (472) is slidably connected with an n-shaped rod (473) that is slidably connected to the threaded sleeve (471). One end of the n-shaped rod (473) extends through the threaded sleeve (471) and is fixedly connected to a sealing plate (460).
5. The cooling device for a single-cylinder diesel engine according to claim 4, characterized in that, The top of the threaded seat (472) is provided with a sliding cavity (474), and an anti-detachment block (475) is slidably connected inside the sliding cavity (474) and fixedly connected to the n-shaped rod (473).
6. The cooling device for a single-cylinder diesel engine according to claim 5, characterized in that, The maximum height to which the anti-detachment block (475) slides inside the sliding cavity (474) is greater than the maximum height to which the threaded seat (472) penetrates into the threaded sleeve (471), and the bottom of the anti-detachment block (475) contacts the inner bottom wall of the sliding cavity (474).
7. The cooling device for a single-cylinder diesel engine according to claim 4, characterized in that, An adjusting ring (476) is fixedly connected to the bottom of the threaded seat (472), and the corners of the adjusting ring (476) are rounded.