Air cylinder cover water jacket degassing device
By designing a cylinder head water jacket degassing device, the cylinder head water jacket sand hole is used to discharge gas, which solves the problem of gas discharge instability caused by the change of the highest point position of the cylinder head water jacket in a large-cylinder engine, and improves the reliability and normal use performance of the engine.
Patent Information
- Application Number
- CN202420780242.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-04-16
AI Technical Summary
In large-bore engines, the change in the highest point of the cylinder head water jacket leads to unstable gas discharge, affecting the normal use of the engine.
A cylinder head water jacket degassing device is designed, including cylinder head, degassing pipe, 0-ring, degassing adapter and flange bolts, and gas is discharged through the water jacket sand drain hole on the cylinder head to ensure sealing and stability.
It effectively solves the problem of gas discharge instability caused by the change of the highest point position of the cylinder head water jacket, and improves the reliability and normal use performance of the engine.
Smart Images
Figure CN222810883U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of large-cylinder engines, in particular to a cylinder head water jacket degassing device. Background Art
[0002] For large-bore engines, reliability is the most important thing. To ensure reliability, when there is a slight leak from the air side to the water side of the engine during use, in order not to affect the normal use of the engine, the cooling system is required to promptly discharge the gas in the coolant, including air or exhaust gas, to prevent air blockage in the cooling system or air accumulation in front of the water pump, which will cause the water pump performance to decline, thereby affecting the normal use of the engine.
[0003] At present, the layout of the TGDI engine in the whole vehicle is front-mounted front-wheel drive FF, and the cylinder head large circulation water outlet position is the highest point of the cylinder head water jacket. The gas generated in the cylinder head water jacket can be discharged from the cylinder head large circulation water outlet position. If the front-mounted front-wheel drive TGDI engine is designed as a longitudinal rear-wheel drive engine, the cylinder head water outlet position is at the rear end of the engine. Because the engine tilts backward at an angle of 3°-5° in the whole vehicle layout, the highest point position of the cylinder head water jacket also changes. The highest point position is on the exhaust side of the cylinder head near the front end water jacket cylinder head upper water jacket sand discharge hole position. When the highest point position changes, the gas discharge will be unstable. Summary of the invention
[0004] In order to solve the above problems, that is, to solve the problems raised by the above background technology, the utility model proposes a cylinder head water jacket degassing device, which includes a cylinder head, a cylinder head front end face is arranged at the right end of the cylinder head, a cylinder head exhaust part is arranged at the left end of the cylinder head, a cylinder head upper water jacket sand discharge hole is arranged on the cylinder head, a cylinder head water jacket is arranged below the cylinder head upper water jacket sand discharge hole, an O-ring is arranged between the cylinder head water jacket and the degassing pipe, a degassing adapter is sealed on one side of the cylinder head upper water jacket sand discharge hole through an O-ring, a degassing adapter is welded to one end of the degassing adapter, a joint flange is welded to the other end of the degassing adapter, and the joint flange is fixed to the top of the cylinder head by flange bolts.
[0005] Preferably, a floating bracket is provided above the degassing pipe via a washer bolt, a cylinder head cover insert is fixed below the degassing pipe via a washer bolt, and a cylinder head cover is provided between the floating bracket and the degassing pipe, wherein the floating bracket is fixed above the cylinder head cover via a washer bolt, and the degassing pipe is fixed below the cylinder head cover.
[0006] Preferably, the flange bolts are steel flange bolts, and the welding is copper brazing.
[0007] The beneficial technical effects of the utility model are:
[0008] 1. Since the sand discharge hole is located at the highest point of the cylinder head water jacket at the front end of the cylinder head exhaust side, the cylinder head water jacket exhaust problem of the front-mounted front-wheel drive turbocharged engine designed as a longitudinal rear-wheel drive turbocharged engine is solved;
[0009] 2. Use O-ring to seal between the joint and the cylinder head water jacket, with strong sealing performance. The O-ring (15.5*2.65) and its matching groove surface meet the GB / T 3452 standard;
[0010] 3. Use welding to connect the joint, joint flange and degassing pipe, avoiding complex integrated casting or complex machining process, and high processability;
[0011] 4. Use flange bolts to fix the joint flange to the cylinder head. The minimum friction force required to resist the rotation of the joint is 1609N, which meets the force requirements and will not loosen.
[0012] 5. Use a floating bracket to provide a fixing point between the degassing pipe and the cylinder head cover. The floating bracket can rotate or move along the direction of the degassing pipe at the end of the degassing pipe to avoid installation difficulties;
[0013] 6. Use bolts with washers to fix the floating bracket to the cylinder head cover without structural damage;
[0014] 7. The end of the degassing pipe is located at the front end of the engine, with a large gap between it and other engine parts, making it easy to install and remove the external hose;
[0015] The gas generated in the cylinder head water jacket is discharged through the sand discharge holes of the water jacket on the exhaust side of the cylinder head, and then through the joint and the degassing pipe, thus avoiding local overheating of the cylinder head water jacket and cavitation. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 A schematic structural diagram of this embodiment is shown.
[0017] Figure 2 Shows Figure 1 AA section view.
[0018] Figure numerals: cylinder head 1, cylinder head front end face 2, cylinder head exhaust part 3, cylinder head upper water jacket sand discharge hole 4, cylinder head water jacket 5, degassing adapter 6, degassing pipe 7, flange bolts 8, joint flange 9, floating bracket 10, bolts with washers 11, cylinder head cover 12, cylinder head cover insert 13, O-ring 14. DETAILED DESCRIPTION
[0019] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.
[0020] See also Figure 1 As shown, the utility model proposes a cylinder head water jacket degassing device, comprising a cylinder head 1, a cylinder head front end surface is arranged at the right end of the cylinder head 1, a cylinder head exhaust portion 3 is arranged at the left end of the cylinder head 1, the exhaust gas temperature generated in the engine is relatively high, and the exhaust gas is discharged through the cylinder head exhaust portion 3, the cylinder head 1 is provided with a cylinder head upper water jacket sand discharge hole 4, the gas generated in the cylinder head water jacket, that is, the hot air is discharged through the cylinder head upper water jacket sand discharge hole 4, a cylinder head water jacket 5 is arranged below the cylinder head upper water jacket sand discharge hole 4, and a coolant is arranged in the cylinder head water jacket 5. When the pressure in the cylinder head water jacket decreases and the flow rate increases, the gas in the liquid forms bubbles. In the high pressure area, the bubbles Collapse causes local liquid collapse, that is, cavitation occurs. In addition, local overheating occurs in the cylinder head water jacket. In order to solve these problems, the coolant in the cylinder head water jacket 5 circulates internally to drive the hot air to be discharged, which can effectively alleviate the above-mentioned adverse phenomena. An EPDM rubber O-ring 14 is arranged between the cylinder head water jacket 5 and the degassing pipe 7. One side of the cylinder head upper water jacket sand discharge hole 4 is sealed with a 304 stainless steel degassing adapter 6 through two EPDM rubber O-rings 14. An O-ring 14 with a specification of 15.5*2.65 is used to achieve sealing between the joint and the cylinder head water jacket. The sealing is strong, and the O-ring and its matching groove surface meet GB / T 3452 standard, a degassing pipe 7 is brazed on one end of the degassing adapter 6, and the end of the degassing pipe 7 is located at the front end of the engine as a whole, with a large gap between it and other parts of the engine, which is convenient for installing and removing the external hose. An aluminum joint flange 9 is brazed on the other end of the degassing adapter 6, and the aluminum joint flange 9 is fixed on the top of the cylinder head 1 by a steel flange bolt 8, so that the minimum friction force required to resist the rotation of the joint flange 9 is 1609N, which meets the force requirements and will not loosen. The degassing adapter 6, the joint flange 9 and the degassing pipe 7 are connected by welding to avoid complex integrated casting or complex machining procedures.
[0021] In this embodiment, please refer to Figure 2As shown, a SP generally cold-rolled carbon steel floating bracket 10 is provided above the degassing pipe 7 through a steel washer bolt 11. The floating bracket is fixed to the cylinder head cover by the washer bolt without structural damage. A YiChe lead brass cylinder head cover insert 13 is fixed below the degassing pipe 7 through the washer bolt 11. A cylinder head cover 12 is provided in the middle of the floating bracket 10 and the degassing pipe 7, wherein the floating bracket 10 is fixed above the cylinder head cover 12 through the washer bolt 11 to provide a fixing point between the degassing pipe 7 and the cylinder head cover 12, and the floating bracket 10 can rotate or move along the direction of the degassing pipe 7 at the end of the degassing pipe 7, and the degassing pipe 7 is fixed below the cylinder head cover 12.
[0022] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
[0023] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0024] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.
[0025] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.
[0026] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims
1. A cylinder head water jacket degassing device, comprising a cylinder head (1), characterized in that: The right end of the cylinder head (1) is provided with a cylinder head front end surface (2), the left end of the cylinder head (1) is provided with a cylinder head exhaust portion (3), the cylinder head (1) is provided with a cylinder head upper water jacket sand discharge hole (4), a cylinder head water jacket (5) is provided below the cylinder head upper water jacket sand discharge hole (4), an O-ring (14) is provided between the cylinder head water jacket (5) and the degassing pipe (7), one side of the cylinder head upper water jacket sand discharge hole (4) is sealed with a degassing adapter (6) through an O-ring (14), one end of the degassing adapter (6) is welded with a degassing pipe (7), and the other end of the degassing adapter (6) is welded with a joint flange (9), and the joint flange (9) is fixed to the top of the cylinder head (1) through a flange bolt (8).
2. The cylinder head water jacket degassing device according to claim 1, characterized in that: A floating bracket (10) is arranged above the degassing pipe (7) via a gasket bolt (11), a cylinder head cover insert (13) is fixed below the degassing pipe (7) via a gasket bolt (11), a cylinder head cover (12) is arranged in the middle between the floating bracket (10) and the degassing pipe (7), wherein the floating bracket (10) is fixed above the cylinder head cover (12) via a gasket bolt (11), and the degassing pipe (7) is fixed below the cylinder head cover (12).
3. The cylinder head water jacket degassing device according to claim 1, characterized in that: The flange bolts are steel flange bolts, and the welding is copper brazing welding.