Piston with steel top and steel skirt

Abstract

The utility model relates to the technical field of diesel engine pistons, in particular to a steel top and steel skirt piston which comprises a piston top, a piston skirt is fixedly connected to the upper end of the piston top, and a connecting buckle is arranged on the inner wall of the piston skirt. The cooling mechanism is arranged in the piston skirt, and the lower end of the cooling mechanism extends to the lower end of the piston top; wherein the cooling mechanism comprises two groups of guide edges arranged on the surface of the piston skirt; according to the steel top and steel skirt piston, under the action of the cooling mechanism, the auxiliary cooling effect on metal can be achieved, oil is distributed, heat exchange is conducted on the metal, meanwhile, the oil is guided in an auxiliary mode, the oil can be well replaced in the device, and the service life of the oil is prolonged. The phenomenon that oil flows unsmoothly in a local area in the device is avoided, the cooling effect of the device is improved, thermal expansion deformation of metal is reduced, abrasion is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel engine pistons, in particular to a steel top and steel skirt piston. Background Art

[0002] Diesel engine pistons are subject to alternating loads, wear and high-temperature corrosive media. From a reliability perspective, they are essentially unreliable parts. Currently, heavy trucks, locomotives, engineering machinery, ship main engines, and marine and land-based power station diesel engines are all developing in the direction of high speed, high load and high strength, and the requirements for the piston, which is the "heart" of the diesel engine, are becoming more and more stringent. Although aluminum pistons have the advantage of light weight, they are gradually unable to meet the current diesel engine's high speed, high load and high strength requirements, and various steel and iron pistons are constantly emerging;

[0003] After searching the prior art, "a forged steel integral piston" was found with the publication number "CN204677307U". This device reduces the difficulty of the piston manufacturing process and improves the manufacturing reliability. However, the temperature of the device is relatively high during use, and the metal expands and contracts due to heat and cold, which will cause expansion, causing the device to wear and reducing the service life of the device.

[0004] Therefore, a steel top and steel skirt piston is proposed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a steel-top and steel-skirt piston in order to solve the above-mentioned problem, which improves the problem that the temperature is high during use, the metal expands and contracts due to heat and cold, which will cause expansion, resulting in wear of the device and reducing the service life of the device.

[0006] The utility model achieves the above-mentioned purpose through the following technical scheme: a steel-top and steel-skirt piston, comprising: a piston top, the upper end of the piston top is fixedly connected to the piston skirt, and the inner wall of the piston skirt is provided with a connecting buckle; a cooling mechanism, the cooling mechanism is arranged inside the piston skirt, and the lower end of the cooling mechanism extends to the lower end of the piston top; wherein the cooling mechanism comprises two groups of guide edges arranged on the surface of the piston skirt, a diversion cooling component is arranged between the two groups of guide edges, the diversion cooling component is arranged inside the piston skirt, the lower end of the diversion cooling component extends to the inside of the piston top, and the lower end of the diversion cooling component is provided with a diversion mixing component, and the diversion mixing component is located inside the piston top.

[0007] Preferably, the diversion cooling component includes a plurality of diversion side plates fixedly connected to the inner wall of the piston skirt, the lower end of the diversion side plate is fixedly connected to a heat exchange plate, the heat exchange plate is fixedly connected to the inner wall of the piston top, and the inner wall of the heat exchange plate is fixedly connected to a heat conducting rod, so that heat exchange effect is achieved under the action of the diversion side plate and the heat exchange plate.

[0008] Preferably, the flow-guiding mixing assembly includes a connecting seat fixedly connected to the lower end of the piston top, a mixing chamber and a flow-guiding channel are provided inside the connecting seat, a piston ring is provided on the outside of the mixing chamber, an oil outlet hole is provided at the lower end of the connecting seat, the oil outlet hole is connected to the mixing chamber, and the mixing chamber has an auxiliary cooling effect on the connecting seat.

[0009] Preferably, the multiple diversion side plates are arranged between the two connecting buckles, and the multiple diversion side plates are arranged parallel to each other. The oil is separated into multiple parts under the action of the multiple diversion side plates and the heat exchange plate, and the separated oil improves the effect of heat exchange.

[0010] Preferably, a groove is provided at the upper end of the heat exchange plate, and the groove is arranged in an arc shape. The arc shape can avoid contact with the piston rod, thereby ensuring stable operation of the device.

[0011] Preferably, a plurality of guide channels are provided, the guide channels are connected to the mixing chamber, and the guide channels are distributed in a ring shape along the inner wall of the mixing chamber. The ring shape distribution allows the oil to be injected evenly and cooled evenly, thereby reducing local heating.

[0012] Preferably, a plurality of mixing guide blocks are fixedly connected to the inner wall of the piston ring, and the plurality of mixing guide blocks are distributed in a ring shape along the inner wall of the piston ring. The mixing guide blocks are staggered with the adjacent guide channels. Under the action of the mixing guide blocks, the oil is laterally guided, the oil inside the mixing bin rotates, and a preliminary mixing effect is achieved in the mixing bin.

[0013] The beneficial effects of the utility model are:

[0014] 1. The steel-top and steel-skirt piston can assist in cooling the metal under the action of the cooling mechanism. The device exchanges heat with the metal by diverting the oil and guides the oil to ensure that the oil can be replaced well inside the device, thus avoiding poor flow of the oil in local areas inside the device. This improves the cooling effect of the device, reduces the thermal expansion deformation of the metal, reduces wear and extends the service life.

[0015] 2. By setting up a guide mixing component, the oil circulating inside can be assisted in guiding under the action of the guide mixing component. The device has a lateral guide effect on the oil through the action of the mixing guide block in the cavity, so that the oil is initially mixed and circulated evenly inside the mixing bin, thereby avoiding local heating during the use of the connecting seat and extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the cooling mechanism structure of the utility model;

[0018] Figure 3 It is a partial cross-sectional view of the flow-dividing and cooling component of the utility model;

[0019] Figure 4 It is an exploded cross-sectional view of the flow-guiding mixing component of the utility model.

[0020] In the figure: 1. piston top; 2. piston skirt; 3. cooling mechanism; 31. guide edge; 32. diversion cooling assembly; 321. diversion side plate; 322. heat exchange plate; 323. groove; 324. connecting heat conduction rod; 33. diversion mixing assembly; 331. guide channel; 332. mixing chamber; 333. oil outlet; 334. piston ring; 335. mixing guide block; 336. connecting seat. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] When implementing: Figure 1-4 As shown, a steel-top steel-skirt piston comprises: a piston top 1, the upper end of the piston top 1 is fixedly connected to a piston skirt 2, and the inner wall of the piston skirt 2 is provided with a connecting buckle; a cooling mechanism 3, the cooling mechanism 3 is arranged inside the piston skirt 2, and the lower end of the cooling mechanism 3 extends to the lower end of the piston top 1; wherein the cooling mechanism 3 comprises two groups of guide edges 31 arranged on the surface of the piston skirt 2, a flow-dividing cooling component 32 is arranged between the two groups of guide edges 31, the flow-dividing cooling component 32 is arranged inside the piston skirt 2, the lower end of the flow-dividing cooling component 32 extends to the inside of the piston top 1, and a flow-dividing mixing component 33 is arranged at the lower end of the flow-dividing cooling component 32, and the flow-dividing mixing component 33 is located inside the piston top 1;

[0023] like Figure 1 , Figure 2 and Figure 3As shown, the shunt cooling assembly 32 includes a plurality of shunt side plates 321 fixedly connected to the inner wall of the piston skirt 2, a heat exchange plate 322 is fixedly connected to the lower end of the shunt side plate 321, the heat exchange plate 322 is fixedly connected to the inner wall of the piston top 1, a connecting heat-conducting rod 324 is fixedly connected to the inner wall of the heat exchange plate 322, a plurality of shunt side plates 321 are arranged between two connecting buckles, a plurality of shunt side plates 321 are arranged parallel to each other, a groove 323 is opened at the upper end of the heat exchange plate 322, and the groove 323 is arranged in an arc shape;

[0024] When in use, the cooling oil enters the interior of the piston skirt 2, and the oil is separated into multiple parts under the action of the multiple diversion side plates 321 and the heat exchange plate 322. The separated oil has a heat exchange effect under the action of the diversion side plates 321 and the heat exchange plate 322, so as to maintain the temperature of the piston skirt 2, avoid the expansion and deformation of the metal due to overheating, reduce the overheating wear of the piston skirt 2, and extend the service life;

[0025] like Figure 1 , Figure 2 and Figure 4 As shown, the flow guide mixing component 33 includes a connecting seat 336 fixedly connected to the lower end of the piston top 1, a mixing chamber 332 and a flow guide 331 are provided inside the connecting seat 336, a piston ring 334 is sleeved on the outside of the mixing chamber 332, an oil outlet hole 333 is provided at the lower end of the connecting seat 336, the oil outlet hole 333 is communicated with the mixing chamber 332, a plurality of flow guides 331 are provided, the flow guides 331 are communicated with the mixing chamber 332, the flow guides 331 are annularly distributed along the inner wall of the mixing chamber 332, a plurality of mixing guide blocks 335 are fixedly connected to the inner wall of the piston ring 334, the plurality of mixing guide blocks 335 are annularly distributed along the inner wall of the piston ring 334, and the mixing guide blocks 335 are staggered with adjacent flow guides 331;

[0026] When in use, the oil enters the interior of the piston top 1, and is then introduced into the mixing chamber 332 through a plurality of guide channels 331, and the connecting seat 336 is assisted in cooling by the mixing chamber 332, wherein the mixing chamber 332 cooperates with the piston ring 334 to form a cavity, and under the action of the mixing guide block 335, the cavity has a lateral flow guide effect on the oil, so that the oil inside the mixing chamber 332 rotates, and is then discharged to the outside through the oil outlet hole 333. At this time, the oil inside the mixing chamber 332 is replaced once, avoiding local overheating and maintaining a good and continuous cooling effect.

[0027] When the utility model is in use, the cooling oil enters the interior of the piston skirt 2, and the oil is separated into multiple parts under the action of multiple diversion side plates 321 and heat exchange plates 322, wherein the separated oil performs heat exchange under the action of the diversion side plates 321 and the heat exchange plates 322, thereby reducing the overheating and wear of the piston skirt 2, and the oil enters the interior of the piston top 1, and is introduced into the mixing chamber 332 through multiple guide channels 331, and the mixing chamber 332 assists in cooling the connecting seat 336, wherein the mixing chamber 332 cooperates with the piston ring 334 to form a cavity, and in this cavity, under the action of the mixing guide block 335, the oil is laterally guided, and the oil inside the mixing chamber 332 rotates, and then is guided to the outside through the oil outlet hole 333, thereby avoiding local overheating.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A steel top and steel skirt piston, characterized in that: include: A piston top (1), the upper end of the piston top (1) being fixedly connected to a piston skirt (2), and the inner wall of the piston skirt (2) being provided with a connecting buckle; A cooling mechanism (3), the cooling mechanism (3) being arranged inside the piston skirt (2), the lower end of the cooling mechanism (3) extending to the lower end of the piston top (1); The cooling mechanism (3) comprises two groups of guide edges (31) arranged on the surface of the piston skirt (2), a flow diversion cooling component (32) is arranged between the two groups of guide edges (31), the flow diversion cooling component (32) is arranged inside the piston skirt (2), the lower end of the flow diversion cooling component (32) extends to the inside of the piston top (1), and a flow diversion mixing component (33) is arranged at the lower end of the flow diversion cooling component (32), and the flow diversion mixing component (33) is located inside the piston top (1).

2. A steel top and steel skirt piston according to claim 1, characterized in that: The flow-dividing and cooling component (32) comprises a plurality of flow-dividing side plates (321) fixedly connected to the inner wall of the piston skirt (2); a heat exchange plate (322) is fixedly connected to the lower end of the flow-dividing side plate (321); the heat exchange plate (322) is fixedly connected to the inner wall of the piston top (1); and a connecting heat-conducting rod (324) is fixedly connected to the inner wall of the heat exchange plate (322).

3. A steel top and steel skirt piston according to claim 1, characterized in that: The flow-guiding mixing assembly (33) comprises a connecting seat (336) fixedly connected to the lower end of the piston top (1); a mixing chamber (332) and a flow-guiding channel (331) are provided inside the connecting seat (336); a piston ring (334) is sleeved on the outside of the mixing chamber (332); an oil outlet hole (333) is provided at the lower end of the connecting seat (336); and the oil outlet hole (333) is in communication with the mixing chamber (332).

4. A steel top and steel skirt piston according to claim 2, characterized in that: The plurality of flow-dividing side plates (321) are arranged between the two connecting buckles, and the plurality of flow-dividing side plates (321) are arranged parallel to each other.

5. A steel top and steel skirt piston according to claim 2, characterized in that: A groove (323) is provided at the upper end of the heat exchange plate (322), and the groove (323) is arranged in an arc shape.

6. A steel top and steel skirt piston according to claim 3, characterized in that: A plurality of flow guide channels (331) are provided, the flow guide channels (331) are in communication with the mixing chamber (332), and the flow guide channels (331) are distributed in a ring shape along the inner wall of the mixing chamber (332).

7. A steel top and steel skirt piston according to claim 6, characterized in that: A plurality of mixing guide blocks (335) are fixedly connected to the inner wall of the piston ring (334); the plurality of mixing guide blocks (335) are distributed in a ring shape along the inner wall of the piston ring (334); and the mixing guide blocks (335) are staggered with adjacent guide channels (331).

Images