A diesel engine high-efficiency heat dissipation wet cylinder liner and cooling method

Abstract

The invention discloses a diesel engine high-efficiency heat dissipation wet cylinder liner and cooling method, which relates to the field of engine cooling, including a cylinder sleeve, a temperature difference power generation device, an armature winding, an iron core and a spiral blade. The outer ring of the cylinder sleeve is surrounded by a temperature difference power generation device, and the wire on the temperature difference power generation device is connected to the brush; the outer ring of the temperature difference power generation device is provided with an iron core; the iron core is in contact with the brush; both ends of the iron core cooperate with a slideway or a rolling bearing; under the action of an external force, the iron core can rotate around the cylinder sleeve; core columns are evenly distributed on the outer side of the iron core; the armature winding is wound on the core column; and spiral blades are installed on the core column. The diesel engine high-efficiency heat dissipation wet cylinder liner of the invention can generate current through the temperature difference power generation device. When the brush supplies power to the armature winding, the coil connected to the iron core will be subjected to a torque, and the entire armature iron core winding will rotate in a certain direction, driving the spiral blades to rotate and disturb the cooling water, thereby promoting the circulation and heat dissipation of the cooling water.

Description

Technical Field

[0001] The invention relates to the field of engine cooling, and in particular to a diesel engine high-efficiency heat dissipation wet cylinder liner and a cooling method. Background Art

[0002] Diesel engines play a very important role in life and production in modern society. They have many advantages, including high thermal efficiency, wide power and speed range, and good maneuverability, so they are widely used in many industrial and life fields.

[0003] The cylinder liner is one of the key components in a diesel engine. It is installed in the cylinder bore of the engine body and forms the working space of the piston together with the cylinder head. The function of the cylinder liner is to ensure that the piston performs stable reciprocating linear motion in it, and convert the reciprocating linear motion of the piston into the rotational motion of the crankshaft through the structure of the connecting rod and the crankshaft, thereby outputting effective work. Therefore, the cylinder liner plays a vital role in the normal operation of the diesel engine.

[0004] During the operation of a diesel engine, the cylinder liner absorbs a large amount of heat due to the combustion of the fuel and the friction between the piston and the inner wall of the cylinder. If the heat cannot be effectively transferred, the temperature of the cylinder liner will continue to rise, which may cause adverse consequences such as piston ring sintering and rapid wear of the cylinder liner, seriously affecting the normal operation of the engine and shortening the life of the engine. Therefore, good cooling of the cylinder liner is particularly important. Effective cooling can be achieved by circulating the coolant in the cooling system. The coolant will flow through the surface of the cylinder liner through the cooling jacket, taking away the heat and dissipating it to the external environment. This can maintain the appropriate operating temperature of the cylinder liner, ensure the normal operation of the piston ring, and reduce the wear of the cylinder liner.

[0005] Good cooling system design and maintenance can ensure that the cylinder liner is properly cooled and improve the stability and efficiency of the diesel engine. Therefore, in the operation of the diesel engine, the cooling performance of the cylinder liner is critical to ensure the normal operation of the engine.

[0006] Cylinder liners can be divided into dry cylinder liners and wet cylinder liners according to different cooling methods. Dry cylinder liners do not directly contact the coolant, while the outer surface of the wet cylinder liner is directly in contact with the coolant, and water is usually used as the cooling medium. In contrast, the wet cylinder liner has a better cooling effect. However, one disadvantage of the wet cylinder liner is that it is difficult to seal, and the cooling water is easy to leak from the cooling chamber, which has an adverse effect on the normal operation of the engine. In addition, the outer surface of the wet cylinder liner currently used is usually a smooth cylindrical shape, with a small heat dissipation area and low heat exchange efficiency. Therefore, under high-load conditions of the diesel engine, the wet cylinder liner cannot fully meet the heat dissipation requirements of the diesel engine. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides a diesel engine high-efficiency heat dissipation wet cylinder liner and cooling method, which can meet the heat dissipation requirements of the engine under higher loads and ensure that the engine can operate efficiently and reliably for a long time.

[0008] The present invention achieves the above technical objectives through the following technical means.

[0009] A diesel engine high-efficiency heat dissipation wet cylinder liner, comprising a cylinder sleeve, a support shoulder, a permanent magnet, a temperature difference power generation device, an armature winding, an iron core, a core column and a spiral blade;

[0010] The outer ring at the end of the cylinder sleeve is provided with a supporting shoulder, and permanent magnets and brushes are provided on the upper and lower supporting shoulders; a slideway or ball bearing is provided inside the supporting shoulder; a temperature difference power generation device is provided around the outer ring of the cylinder sleeve, and the wires on the temperature difference power generation device are connected with the brushes; an iron core is provided on the outer ring of the temperature difference power generation device; the iron core is in contact with the brushes; both ends of the iron core are matched with slideways or rolling bearings; under the action of external force, the iron core can rotate around the cylinder sleeve; core columns are evenly distributed on the outside of the iron core; armature windings are wound on the core columns; spiral blades are installed on the core columns.

[0011] In the above solution, the permanent magnets are arc-shaped structures, and there are several of them evenly arranged on the supporting shoulders.

[0012] In the above solution, the curvature of the permanent magnet is 90° to 110°.

[0013] In the above scheme, the brush is arranged above the core column and does not contact the armature winding; there are several brushes and they are evenly arranged.

[0014] In the above solution, the temperature difference power generation device is composed of several semiconductor temperature difference power generation sheets.

[0015] In the above scheme, there are three core columns, and the core columns are parallel to the axial direction of the cylinder sleeve.

[0016] In the above solution, annular grooves are provided at both ends of the iron core, and the annular grooves cooperate with the roller bearings.

[0017] In the above scheme, the cylinder sleeve is also provided with an upper annular band and a lower annular band; the upper annular band and the lower annular band are opened on the outer ring of the support shoulder, wherein the upper annular band is opened on the upper support shoulder, and the lower annular band is opened on the lower support shoulder.

[0018] In the above scheme, the upper annular belt and the lower annular belt are both provided with two water sealing grooves.

[0019] A cooling method for a diesel engine's efficient heat dissipation wet cylinder liner. When the engine is working, a large amount of heat is generated inside the cylinder and transferred to the cylinder sleeve. There is a temperature difference between the inside and outside of the cylinder sleeve. Due to the Seeberk effect, the temperature difference power generation device will generate current and transmit it to the armature winding through wires and brushes. Under the action of the magnetic field generated by the permanent magnet, the current passes through the coil of the armature winding to generate an Ampere force. When the coil of the armature winding is parallel to the magnetic field, the direction of the magnetic field received by the coil will change if it continues to rotate. Since the brush is in contact with the iron core, the direction of the current on the coil is also changing, so the direction of the generated Lorentz force remains unchanged, so the coil continues to receive the force in the same direction, and the iron core rotates around the cylinder sleeve, driving the spiral blades to rotate, so that the cooling water in the cooling chamber is disturbed, thereby improving the convective heat transfer efficiency between the cooling water and the cylinder sleeve.

[0020] Beneficial effects of the present invention:

[0021] 1. In the present invention, a supporting shoulder and an annular belt are provided on the cylinder liner, so that the cylinder liner can be well positioned axially and radially and maintain good water sealing performance.

[0022] 2. In the present invention, by separately arranging a thermoelectric power generation sheet on the surface of the cylinder sleeve, the contact area between the thermoelectric power generation sheet and the heat source can be increased, and a separate power circuit is formed by the thermoelectric power generation sheet at the cylinder sleeve. Compared with connecting the circuit from the outside, the leakage of cooling water can be prevented, which is beneficial to the long-term, efficient and stable operation of the diesel engine.

[0023] 3. In the present invention, the spiral blades are arranged outside the iron core, which can increase the contact area between the cylinder liner and the cooling water. Moreover, due to the turbulent effect of the rotating blades, the flow surface layer of the cooling water is destroyed, and the cooling water is in a turbulent state during the flow process. Such a setting can improve the convective heat exchange efficiency between the cooling water and the cylinder liner, which is conducive to transferring the heat absorbed by the cylinder liner and meeting the heat dissipation requirements of the diesel engine when working under high load.

[0024] 4. In the present invention, a quasi-DC motor structure composed of permanent magnets and armature core windings is arranged on the outer layer of the cylinder sleeve. The armature core part is driven by current to rotate rapidly around the sleeve to form a rotation effect so that the cylinder sleeve as a whole remains stable under vibration.

[0025] 5. The cylinder liner of the present invention not only has high heat exchange efficiency with cooling water, but also has reasonable structure, convenient manufacturing and installation, and stable working state, so it can improve the stability and reliability of the diesel engine and ensure that the diesel engine can operate safely and efficiently for a long time.

[0026] 6. In the present invention, the brushes and the armature windings do not contact each other to prevent mutual wear. There are generally two brushes, which are part of the entire circuit.

[0027] 7. In order to meet the requirement of sufficient magnetic field strength and to perform magnetic flux cutting motion within a sufficient rotation period, the arc of the permanent magnet is 90° to 110°. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a diesel engine high-efficiency heat dissipation wet cylinder liner involved in an embodiment of the present invention;

[0029] Figure 2 for Figure 1 Schematic diagram of longitudinal section;

[0030] Figure 3 for Figure 2 AA schematic diagram;

[0031] Figure 4 for Figure 2 BB schematic diagram;

[0032] Figure 5 It is a three-dimensional schematic diagram of the present invention.

[0033] Reference numerals:

[0034] 1- cylinder sleeve; 2- support shoulder; 3- upper annular belt; 4- lower annular belt; 5- permanent magnet; 6- temperature difference power generation device; 7- wire; 8- brush; 9- ball bearing; 10- armature winding; 11- iron core; 12- core column; 13- spiral blade. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to 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" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Combination Figure 1-5 As shown, a spiral blade heat transfer wet cylinder liner for a diesel engine includes a cylinder liner 1, a support shoulder 2, an upper annular belt 3, a lower annular belt 4, a permanent magnet 5, a temperature difference power generation device 6, a wire 7, a brush 8, a ball bearing 9, an armature winding 10, an iron core 11, a core column 12 and a spiral blade 13.

[0039] The cylinder sleeve 1 is installed in the cylinder hole of the body. The top of the cylinder sleeve 1 is provided with a radially protruding support shoulder 2, and an upper annular belt 3 is provided below the support shoulder 2. The bottom of the cylinder sleeve 1 is also provided with a radially lower annular belt 4. Two water sealing ring grooves are respectively provided on the outer side of the upper annular belt 3 and the outer side of the lower annular belt 4 of the cylinder sleeve 1. The upper annular belt 3 and the lower annular belt 4 are in contact with the wall of the body to form a cooling cavity that can cool the cylinder sleeve. Two groups of opposite annular permanent magnets 5 are respectively provided at the bottom of the upper annular belt 3 and the top of the lower annular belt 4. The permanent magnets 5 provided below the upper support shoulder 2 and the permanent magnets 5 provided above the lower support shoulder 2 are arranged oppositely. There are 4 permanent magnets 5 in total, which are in the shape of arc annular belts with an arc angle of 110°. The permanent magnets 5 are evenly arranged on the support shoulder 2. Two brushes 8 arranged oppositely are connected to the bottom surface of the upper annular belt 3. Two annular grooves are respectively arranged on the lower side of the upper annular belt 3 and the upper side of the lower annular belt 4 .

[0040] The temperature difference power generation device 6 is installed on the middle section of the cylinder sleeve 1 where the diameter is the shortest. The temperature difference power generation device 6 is composed of many square semiconductor temperature difference power generation sheets. The semiconductor temperature difference power generation sheets completely cover the wall surface to absorb the heat of the cylinder sleeve 1 and convert it into electrical energy. The wire 7 of the temperature difference power generation device 6 extends from the opposite sides of the upper end of the outer wall of the cylinder sleeve, and the two ends of the wire 7 are respectively connected to the two brushes 8 at the bottom of the upper annular belt 3.

[0041] The upper and lower ends of the cylindrical part of the core 11 each have an annular groove, which can fit with the annular grooves on the lower side of the upper annular band 3 and the upper side of the lower annular band 4 of the cylinder sleeve 1. Two sets of ball bearings 9 are respectively arranged in the annular grooves, and the inner sides of the ball bearings 9 are connected to the upper annular band 3 and the lower annular band 4, and the outer sides thereof are connected to the top and the bottom of the core 11, so that the core 11 can rotate around the cylinder sleeve 1; or slideways are arranged on the lower side of the upper annular band 3 and the upper side of the lower annular band 4, and the two ends of the core 11 are respectively arranged in the slideways, and under the action of external force, the core 11 can rotate around the slideways. A core column 12 is arranged along the cylindrical part of the core 11 every 110 degrees around the axis, such as Figure 4 As shown. Copper wire is wound around the core column 12 to form the armature winding 10. The thickness of the armature winding 10 is ensured not to be too thick to avoid contact with the brush 8 at the upper end and the annular belt 4 at the lower end and wear. The spiral blade 13 is fixed on the outer side of the core column 12, as shown. Figure 5 As shown, the spiral blade 13 is wound around the outside of the cylinder sleeve 1 and rotates together with the armature winding 10 and the iron core 11.

[0042] The surface of the cylinder liner body has supporting shoulders 2, annular belts 3, permanent magnets 5, armature windings 10, iron cores 11, spiral blades 13 and other structures. The supporting shoulders 2 are used for axial positioning of the cylinder liner, the upper annular belts 3 are used for radial positioning of the cylinder liner, the permanent magnets 5 are used to generate torque on the energized armature windings 10, the iron cores 11 are used to fix the armature windings 10, and the spiral blades 13 are used to generate disturbances on the cooling water.

[0043] When the cylinder liner is installed in the cylinder hole, the support shoulder 2 on the top has a larger outer diameter, which will match the step on the upper surface of the cylinder hole, and the cylinder head is clamped to finally fix the cylinder liner axially. The annular belt 3 in the middle of the cylinder liner contacts the wall of the engine body to fix the cylinder liner radially.

[0044] The upper annular band 3 on the upper part of the cylinder sleeve 1 and the lower annular band 4 on the outer side of the lower support shoulder 4 each have two water sealing grooves. When installing the cylinder sleeve 1, the rubber water sealing ring at the water sealing groove is pressed against the body wall to form a good sealing effect. The support shoulder 3 and the upper annular band 3, the lower annular band 4 and the body wall are in contact to form a cooling cavity, and the cooling cavity wall is in contact with the cooling water for convective heat transfer, thereby cooling the lower part of the cylinder sleeve. A spiral blade 13 is arranged on the outer side of the core column 12. The spiral blade 13 can increase the contact area between the cylinder sleeve and the cooling water as a whole. In addition, the spiral blade 13 can destroy the surface layer formed when the cooling water flows, so that the cooling water is in a turbulent state, and the disturbance when the cooling water flows is more intense, thereby improving the convective heat exchange efficiency between the cooling water and the cylinder sleeve.

[0045] When the engine is working, a large amount of heat is generated inside the cylinder and transferred to the cylinder sleeve 1. There is a temperature difference between the inside and outside of the cylinder sleeve 1. Due to the Seeberk effect, the temperature difference power generation device 6 on the cylinder sleeve 1 generates current and transmits it to the armature winding 10 through the wire 7 and the brush 8. The arc-shaped permanent magnet 5 generates a magnetic field. The current generates an Ampere force through the coil of the armature winding 10. When the coil is parallel to the magnetic field, the direction of the magnetic field received by the coil will change if it continues to rotate. The brush 8 contacts the iron core 11, so that the direction of the current on the coil also changes. The direction of the generated Lorentz force remains unchanged, so the coil continues to receive the force in the same direction. Since the upper ball bearing 9 and the lower ball bearing 10 allow the iron core 11 to rotate around the cylinder sleeve 1, the armature winding 10 drives the iron core 11 to rotate in one direction, so the spiral blade 13 on the outside of the core column 12 starts to rotate with the iron core 11, so that the cooling water in the cooling chamber is disturbed, and the convection heat exchange efficiency between the cooling water and the cylinder sleeve is improved. The effect of high-speed rotating body producing precession under the action of external torque is called gyration effect. The gyration effect can keep the cylinder sleeve stable in the cylinder hole and reduce vibration.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0047] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A diesel engine high-efficiency heat dissipation wet cylinder liner, characterized in that: It comprises a cylinder sleeve (1), a support shoulder (2), a permanent magnet (5), a temperature difference power generation device (6), an armature winding (10), an iron core (11), a core column (12) and a spiral blade (13); The outer ring of the end of the cylinder sleeve (1) is provided with a support shoulder (2), the upper and lower support shoulders (2) are provided with permanent magnets (5), and the upper support shoulder (2) is provided with a brush (8); a slideway or a ball bearing (9) is provided inside the support shoulder (2); a temperature difference power generation device (6) is provided around the outer ring of the cylinder sleeve (1), and the wire (7) on the temperature difference power generation device (6) is connected to the brush (8); an iron core (11) is provided on the outer ring of the temperature difference power generation device (6); the iron core (11) is in contact with the brush (8); both ends of the iron core (11) are matched with the slideway or the ball bearing (9); under the action of an external force, the iron core (11) can rotate around the cylinder sleeve (1); core columns (12) are evenly distributed on the outer side of the iron core (11); an armature winding (10) is wound on the core column (12); and a spiral blade (13) is installed on the core column (12).

2. The diesel engine high-efficiency heat dissipation wet cylinder liner according to claim 1, characterized in that: The permanent magnets (5) are of arc-shaped structure, and are in multiple numbers and evenly arranged on the supporting shoulder (2).

3. The diesel engine high-efficiency heat dissipation wet cylinder liner according to claim 2, characterized in that: The curvature of the permanent magnet (5) is 90° to 110°.

4. The diesel engine high-efficiency heat dissipation wet cylinder liner according to claim 1, characterized in that: The brush (8) is arranged above the core column (12) and does not contact the armature winding (10); there are two brushes (8) which are evenly arranged.

5. The diesel engine high-efficiency heat dissipation wet cylinder liner according to claim 1, characterized in that: The temperature difference power generation device (6) is composed of a plurality of semiconductor temperature difference power generation sheets.

6. The diesel engine high-efficiency heat dissipation wet cylinder liner according to claim 1, characterized in that: There are three core columns (12), and the core columns (12) are axially parallel to the cylinder sleeve (1).

7. The diesel engine high-efficiency heat dissipation wet cylinder liner according to claim 1, characterized in that: Annular grooves are formed at both ends of the iron core (11), and the annular grooves cooperate with the ball bearings (9).

8. The diesel engine high-efficiency heat dissipation wet cylinder liner according to claim 1, characterized in that: The cylinder sleeve (1) is also provided with an upper annular band (3) and a lower annular band (4); the upper annular band (3) and the lower annular band (4) are provided on the outer ring of the support shoulder (2), wherein the upper annular band (3) is provided on the upper support shoulder (2) and the lower annular band (4) is provided on the lower support shoulder (2).

9. The diesel engine high-efficiency heat dissipation wet cylinder liner according to claim 8, characterized in that: The upper annular belt (3) and the lower annular belt (4) are both provided with two water sealing grooves.

10. The method for cooling a diesel engine high-efficiency heat dissipation wet cylinder liner according to any one of claims 1 to 9, characterized in that: When the engine is working, a large amount of heat is generated inside the cylinder and is transferred to the cylinder sleeve (1). There is a temperature difference between the inside and outside of the cylinder sleeve (1). Due to the Seeberk effect, the temperature difference power generation device (6) generates current and transmits it to the armature winding (10) through the wire (7) and the brush (8). Under the action of the magnetic field generated by the permanent magnet (5), the current passes through the coil of the armature winding (10) to generate an Ampere force, driving the coil to rotate around the axis of the cylinder sleeve. When the coil rotates a certain angle, it will be parallel to the magnetic field. After that, the coil continues to rotate due to the change in the direction of the magnetic field. Since the brush (8) is in contact with the iron core (11), the direction of the current on the coil is also changed. Therefore, the direction of the generated Lorentz force remains unchanged. Therefore, the coil continues to receive the force in the same direction and drives the iron core (11) to rotate around the cylinder sleeve (1). At the same time, the spiral blade (13) is driven to rotate, so that the cooling water in the cooling chamber is disturbed, thereby improving the convective heat transfer efficiency between the cooling water and the cylinder sleeve (1).

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