CN211144652U

CN211144652U - Diesel engine body with cooling structure

Info

Publication number: CN211144652U
Application number: CN201921788027.6U
Authority: CN
Inventors: 郭宇飞; 陈勇; 和晓锋
Original assignee: Weichai Heavy Machinery Co Ltd; Chongqing Weichai Engine Co Ltd
Current assignee: Weichai Heavy Machinery Co Ltd; Chongqing Weichai Engine Co Ltd
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2020-07-31
Anticipated expiration: 2029-10-23

Abstract

The utility model belongs to the technical field of internal combustion engines, and relates to a diesel engine body with a cooling structure, which comprises a camshaft cavity, a main oil duct and an auxiliary oil duct, wherein the camshaft cavity, the main oil duct and the auxiliary oil duct are positioned at the control side of the diesel engine body; the air cavity, the main cooling water cavity and the split special-shaped cooling water channel are positioned on the exhaust side of the diesel engine body; the gear chamber is positioned at the flywheel end of the diesel engine body; the crankcase that is located diesel engine organism lower part, set up a plurality of cylinder holes in diesel engine organism upper end, air cavity and total cooling water chamber, all fixed mounting have foraminiferous baffle between total cooling water chamber and crankcase and camshaft chamber and the crankcase, a plurality of inlet openings and crescent rivers passageway have been seted up to the inboard in cylinder hole, have seted up a plurality of apopores on the organism in the cylinder hole outside, it is not good to have solved current diesel engine organism structure cooling effect, influence diesel engine organism life's problem.

Description

Diesel engine body with cooling structure

Technical Field

The utility model belongs to the technical field of the internal-combustion engine, a take cooling structure's diesel engine organism is related to.

Background

With the continuous change of the demand of the market on the diesel engine, the diesel engine is required to output higher power and lower oil consumption, and simultaneously, the increasingly strict emission regulation requirements are met. The existing diesel engine is limited by the engine body structure, so that the power cannot be increased, and the cooling effect of each cylinder cannot meet the cooling requirement of a cylinder sleeve due to the influence of the engine body structure, so that the engine body structure and the cooling mode need to be optimally designed; simultaneously, the cooling water cavity with reasonable design can optimize the cooling effect of the cylinder sleeve and the cylinder cover, thereby enhancing the heat dissipation capacity of the machine body and reducing the heat load of the cylinder cover and the cylinder sleeve.

At present, because of the limitation of a machine body structure, namely the adoption of a series cooling mode, cooling water cannot uniformly cool cylinder sleeves of cylinders, so that the risk of cylinder pulling caused by nonuniform cooling is caused. And the apopore of cooling water is single, can't be fine cooling cylinder head. High-mounted camshafts, which require appropriate camshaft housings, are costly in parts and difficult to install and maintain.

In addition, the existing diesel engine body is made of HT250 material, so that the rigidity is weak and the wall is thin, the improvement of the diesel engine power is directly influenced, and the future market demand cannot be met.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses a solve current diesel engine organism structure cooling effect not good, influence diesel engine organism life's problem, provide a take cooling structure's diesel engine organism.

In order to achieve the purpose, the utility model provides a diesel engine body with a cooling structure, which comprises a camshaft cavity, a main oil duct and an auxiliary oil duct, wherein the camshaft cavity, the main oil duct and the auxiliary oil duct are positioned at the control side of the diesel engine body; the air cavity, the main cooling water cavity and the split special-shaped cooling water channel are positioned on the exhaust side of the diesel engine body; the gear chamber is positioned at the flywheel end of the diesel engine body; the engine comprises a crankcase located at the lower portion of a diesel engine body, a plurality of cylinder holes formed in the upper end of the diesel engine body, partition plates with holes, which are fixedly mounted between an air cavity and a total cooling water cavity, between the total cooling water cavity and the crankcase, and between a camshaft cavity and the crankcase, a plurality of water inlets and crescent water flow channels are formed in the inner side of each cylinder hole, and a plurality of water outlets are formed in the engine body on the outer side of each cylinder hole.

The beneficial effect of this basic scheme lies in: the camshaft cavity, the main oil duct and the auxiliary oil duct of the diesel engine body are positioned on an operation side, the water cavity and the air cavity are positioned on an exhaust side, wherein the engine oil main oil duct is formed in a casting mode, and other oil holes and water holes are machined in the diesel engine body to achieve smoothness of an oil path and a water path. The auxiliary oil passage is used for guiding the engine oil in the main oil passage into each part needing to be lubricated.

The optimal cooling of the cylinder cover can be achieved by reasonably arranging seven water outlet holes distributed on the top surface of the machine body. This organism adopts the casting camshaft chamber of whole casting mode, and the camshaft chamber is used for installing the camshaft, puts the camshaft optimization for putting the camshaft in original height, reduces the peripheral part of diesel engine, has so both reduced the technology degree of difficulty, has also saved manufacturing cost. The air cavity and the main cooling water cavity, the main cooling water cavity and the crankcase, and the camshaft cavity and the crankcase are separated by the partition plate with the hole, so that the strength of the engine body can be improved, and lubricating oil can conveniently flow into the crankcase.

Furthermore, the water inlet holes are three big water inlet holes and four small water inlet holes, and the four small water inlet holes are inclined and communicated with the water outlet holes. Has the advantages that: the diesel engine adopts "parallelly connected" mode cooling each jar cylinder liner, and every jar adopts the water inlet mode of three big four little water holes to satisfy the cooling of cylinder head simultaneously, and wherein four little water inlets adopt certain angle and apopore intercommunication simultaneously, can be fine drawing forth the bubble that produces when satisfying the cooling, prevent organism cave and corrode.

Furthermore, the cross sections of three large water inlet holes in the water inlet holes are variable diameter cross sections with small upper parts and large lower parts. Has the advantages that: the design of the reducing of the water inlet holes can increase the flow speed of cooling water entering the cylinder cover, and meanwhile, the seven water outlet holes are reasonably arranged on the upper plane of the machine body, so that the cooling water can reasonably cool each position of the cylinder cover. The cooling water path is designed in such a way that the temperature of engine oil can be reduced, harmful heat in the engine is reduced, and the service life of the diesel engine is prolonged.

Further, the distance between the cylinder bores is 300 mm.

Furthermore, four arc-shaped reinforcing ribs are fixedly installed between the partition plate and the crankcase. Has the advantages that: four reinforcing ribs with large arcs are arranged in the partition plate and the crankcase, so that the rigidity and the strength of the engine body can be enhanced to a great extent, the vibration amplitude of the engine is reduced, and the service life of the diesel engine is prolonged. The engine body is made of RuT400 materials, so that the strength and the service life of the engine body are greatly improved, and the requirement of a diesel engine on power increase can be further met.

Furthermore, the thickness of the partition plate is 20mm, the thickness of the reinforcing rib is 20-21 mm, and the radius of the transition arc of the reinforcing rib is 580-600 mm.

Further, the distance between the cylinder bores is 300 mm.

The beneficial effects of the utility model reside in that:

1. the utility model discloses a take cooling structure's diesel engine organism, the flow direction of the inside cooling water of organism is: cooling water enters a main cooling water cavity, then enters each cylinder hole of the engine body through a split special-shaped cooling water channel, flows upwards along with a gap between the cylinder sleeve and the cylinder hole of the engine body, and is divided into two paths, wherein one path (I) of cooling water shown in figure 3 cools the cylinder sleeve, then enters three large holes in three large water inlet holes and four small water inlet holes, and then flows out of the three holes in the water outlet holes to enter the cylinder cover; because the upper part of the cylinder hole of the engine body is additionally provided with the four crescent-shaped water flow channels, the other path (II) of cooling water shown in figure 4 continuously flows upwards through the channels, cools the temperature of the piston ring and then flows out of the four holes in the water outlet holes to enter the cylinder cover. The cooling water can cool each position of the cylinder cover reasonably, and the cooling effect of the cylinder sleeve and the cylinder cover is good.

2. The utility model discloses a take cooling structure's diesel engine organism, diesel engine are at the operation in-process, and the micro-vibration of cylinder jacket can produce little vacuum bubble, and this bubble is along with rivers rising in-process at the top gathering, if not from the internal discharge of organism, and long-time in-process bubble can burst gradually, and the impact force of its production can cause certain destruction to the organism. This novel cooling structure combines organism self structure, open four little inlet openings that are the slope form and communicate with the apopore with the cylinder bore inboard under the circumstances of guaranteeing organism intensity, the inclined hole is used for cooling water cooling piston ring transmission temperature (II way cooling water passageway) passageway on the one hand, on the other hand is along with the vacuum bubble that the cylinder jacket produced along with cooling water discharge organism, the ingenious design of inclined hole both provides reasonable cooling water for the cylinder cap, also discharge the vacuum bubble that the cylinder jacket produced simultaneously, the risk that cavitation appears in the organism has been reduced.

3. The design is a four-valve diesel engine body redesigned by combining the latest processing technology and casting technology, and under the premise of meeting various performance indexes, the design provides more strict requirements for peripheral pipelines of the diesel engine, namely no pipeline design, and all pipelines are integrated in the engine body. The engine body with the new structure and the cooling water channel with the new design can effectively improve the cooling efficiency of the diesel engine, and meanwhile, the design of the porous water channel is beneficial to the optimization design of the cylinder cover.

4. The original diesel engine cooling channel is in a series connection mode, the cooling effect is weakened cylinder by cylinder, the cooling uniformity is poor, and the hidden trouble of cylinder pulling exists. And the utility model discloses a take cooling structure's diesel engine organism to present diesel engine organism is the basis, remains to advance to exhaust homonymy structure, adopts the camshaft to put design criterion in, and the cooling adopts the cooling method of "parallelly connected" structure, and the apopore adopts porous water outlet structure simultaneously, and the rational arrangement relevant position provides the cooling of optimization for the cylinder cap. The cooling effect of each cylinder sleeve in the diesel engine is kept consistent, and the uniformity is good.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.

Drawings

For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic structural view of a diesel engine body with a cooling structure according to the present invention;

FIG. 2 is a schematic view of an installation structure of a water inlet hole in a diesel engine body with a cooling structure according to the present invention;

fig. 3 is a schematic view of an installation structure of water outlet holes in a diesel engine body with a cooling structure according to the present invention;

fig. 4 is a schematic view of the installation structure of the water flow channel in the diesel engine body with a cooling structure according to the present invention;

FIG. 5 is a flow diagram of cooling water in the diesel engine body with a cooling structure according to the present invention;

fig. 6 is another flow diagram of cooling water in the diesel engine body with a cooling structure according to the present invention.

Reference numerals: the cooling water system comprises a cylinder hole 1, a crankcase 2, a main cooling water cavity 3, a split special-shaped cooling water channel 31, an air cavity 4, a camshaft cavity 5, a gear chamber 6, a partition plate 7, a reinforcing rib 8, a main oil channel 9, an auxiliary oil channel 10, a water inlet hole 11, a water outlet hole 12 and a water flow channel 13.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

The RuT400 material is used for manufacturing a diesel engine body, is vermicular cast iron, has the tensile strength of 400MPa, is a modern novel cast iron material, and can be referred to GB/T26655-2011 as specific parameter indexes. The material greatly improves the strength and the service life of the engine body, and can further meet the requirement of improving the power of the diesel engine.

The parallel connection in the cooling mode of the parallel connection structure of the diesel engine means that cooling water is divided into cylinders through cooling water cavities, and the cooling between the cylinders is not influenced mutually.

The diesel engine body with the cooling structure shown in fig. 1 to 4 comprises a camshaft cavity 5, a main oil gallery 9 and an auxiliary oil gallery 10, wherein the camshaft cavity is positioned at the control side of the diesel engine body; the air cavity 4, the total cooling water cavity 3 and the split special-shaped cooling water channel 31 are positioned on the exhaust side of the diesel engine body; a gear chamber 6 positioned at the flywheel end of the diesel engine body; the cylinder comprises a crankcase 2 positioned at the lower part of the diesel engine body, a plurality of cylinder holes 1 arranged at the upper end of the diesel engine body, and the distance between the cylinder holes 1 is 300 mm. Perforated partition plates 7 are fixedly arranged between the air cavity 4 and the main cooling water cavity 3, between the main cooling water cavity 3 and the crankcase 2, and between the camshaft cavity 5 and the crankcase 2, and four arc-shaped reinforcing ribs 8 are fixedly arranged between the partition plates 7 and the crankcase 2. The thickness of baffle 7 is 20mm, and the thickness of strengthening rib 8 is 20 ~ 21mm, and the transition circular arc radius of strengthening rib 8 is 580 ~ 600 mm. Four reinforcing ribs 8 with large arcs are arranged in the partition plate 7 and the crankcase 2, so that the rigidity and the strength of the engine body can be enhanced to a great extent, the vibration amplitude of the engine is reduced, and the service life of the diesel engine is prolonged.

Three big four little inlet openings 11 have been seted up to the inboard of

cylinder hole

1, and 4 crescent rivers passageways 13 are seted up on the inboard upper portion of cylinder hole 1, offer 7 apopores 12 on the organism in the cylinder hole 1 outside. The four small water inlet holes 11 are inclined and communicated with the water outlet holes 12. The cross sections of three big water inlet holes 11 in the water inlet holes 11 are variable diameter cross sections with a small upper part and a big lower part. The diesel engine adopts "parallelly connected" mode cooling each jar cylinder liner, and every jar adopts the water inlet mode of three big four little water holes to satisfy the cooling of cylinder head simultaneously, and wherein four little water inlets 11 adopt certain angle and apopore 12 intercommunication simultaneously, can be fine drawing forth the bubble that produces when satisfying the cooling, prevent organism cave and corrode. The design of the water inlet hole 11 with variable diameters can increase the flow rate of cooling water entering the cylinder cover, and meanwhile, the seven water outlet holes 12 are reasonably arranged on the upper plane of the machine body, so that the cooling water can reasonably cool each position of the cylinder cover. The cooling water path is designed in such a way that the temperature of engine oil can be reduced, harmful heat in the engine is reduced, and the service life of the diesel engine is prolonged.

The camshaft cavity 5, the main oil gallery 9 and the auxiliary oil gallery 10 of the diesel engine body are positioned on the control side, the water cavity and the air cavity 4 are positioned on the exhaust side, wherein the engine oil main oil gallery 9 is formed in a casting mode, and other oil holes and water holes are machined in the diesel engine body to achieve smoothness of an oil way and a water way. The auxiliary gallery 10 serves to guide the oil in the main gallery 9 to each of the parts requiring lubrication.

By reasonably arranging seven water outlet holes 12 distributed on the top surface of the machine body, the optimal cooling of the cylinder cover can be achieved. This organism adopts whole casting mode casting camshaft chamber 5, and camshaft chamber 5 is used for installing the camshaft, puts the camshaft optimization for putting the camshaft in original height, reduces the peripheral part of diesel engine, has so both reduced the technology degree of difficulty, has also saved manufacturing cost. The air cavity 4 is separated from the main cooling water cavity 3, the main cooling water cavity 3 is separated from the crankcase 2, and the camshaft cavity 5 is separated from the crankcase 2 by the partition plate 7 with holes, so that the strength of the engine body can be improved, and lubricating oil can conveniently flow into the crankcase 2 well.

The flow direction of cooling water in the machine body is as follows: cooling water enters the main cooling water cavity 3, then enters each cylinder hole 1 of the engine body through the split special-shaped cooling water channel 31, flows upwards along with a gap between the cylinder sleeve and the cylinder hole 1 of the engine body, and is divided into two paths, wherein one path (I) of cooling water shown in figure 5 cools the cylinder sleeve, then enters three large holes in the three large and four small water inlet holes 11, and then flows out of three holes in the water outlet hole 12 and enters the cylinder cover; because the four crescent-shaped water flow channels 13 are additionally arranged at the upper part of the engine body cylinder hole 1, the other path (II) of cooling water shown in figure 6 continuously flows upwards through the channels, cools the temperature of the piston ring and then flows out of the four water outlet holes 12 to enter the cylinder head. The cooling water can cool each position of the cylinder cover reasonably, and the cooling effect of the cylinder sleeve and the cylinder cover is good.

The diesel engine body with the cooling structure has the advantages that:

1. the risk of cavitation erosion of the body is low. The original cooling water channel entering the cylinder cover is one inlet and one outlet, the arrangement is simple, and the risk of cavitation erosion of the engine body is easy to occur because vacuum bubbles generated by slight vibration of the cylinder sleeve cannot be discharged. The novel cooling water channel adopts a water inlet mode with three large holes, four small holes and a water outlet mode with seven water outlet holes 12, and all the holes are reasonably arranged, so that reasonable cooling water is provided for the cylinder cover, vacuum bubbles generated by the cylinder sleeve are discharged, and the risk of cavitation erosion of the engine body is reduced.

2. Compared with the cooling effect of the original diesel engine, the uniformity is good. The original diesel engine cooling channel is in a series connection mode, the cooling effect is weakened cylinder by cylinder, the cooling uniformity is poor, and the hidden trouble of cylinder pulling exists. The novel engine body is reasonably provided with a cooling channel, and a cooling mode of a parallel structure is adopted, so that the cooling effect of each cylinder sleeve in the diesel engine is kept consistent, and the uniformity is good.

3. The cooling efficiency is high. The water of the total cooling water cavity 3 is divided to each cylinder through each cylinder special-shaped water channel through a reasonable cooling water channel, superior advantages are created for cooling of the cooling cylinder sleeve, the crescent water channel 13 is arranged on the upper portion of the cylinder hole 1, cooling water is divided through the crescent water channel 13 well under the condition of ensuring the strength of the engine body, and the cooling effect is better.

4. The complete machine has high reliability. The engine body is made of RuT400 materials, the structure of the engine body is reasonably designed, and corresponding reinforcing ribs 8 are arranged, so that the strength and the service life of the engine body are greatly improved, the strength of the engine body under high power is enhanced, and the requirement of a diesel engine for improving power is further met.

5. The integration degree is high. The gear chamber 6, the camshaft box, the engine oil main oil duct 9 structure, the crankcase 2, the air cavity 4 and other structures are designed into a whole, so that the arrangement of peripheral parts is simplified, the assembly is simplified, and the subsequent market maintenance work is reduced.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. A diesel engine body with a cooling structure is characterized by comprising a camshaft cavity, a main oil duct and an auxiliary oil duct, wherein the camshaft cavity, the main oil duct and the auxiliary oil duct are positioned on the control side of the diesel engine body; the air cavity, the main cooling water cavity and the split special-shaped cooling water channel are positioned on the exhaust side of the diesel engine body; the gear chamber is positioned at the flywheel end of the diesel engine body; the engine comprises a crankcase located at the lower portion of a diesel engine body, a plurality of cylinder holes formed in the upper end of the diesel engine body, partition plates with holes, which are fixedly mounted between an air cavity and a total cooling water cavity, between the total cooling water cavity and the crankcase, and between a camshaft cavity and the crankcase, a plurality of water inlets and crescent water flow channels are formed in the inner side of each cylinder hole, and a plurality of water outlets are formed in the engine body on the outer side of each cylinder hole.

2. The diesel engine body with a cooling structure as claimed in claim 1, wherein the water inlet holes are three large and four small water inlet holes, and the four small water inlet holes are inclined and communicated with the water outlet holes.

3. The diesel engine body with a cooling structure as claimed in claim 2, wherein the three large inlet openings of the inlet openings have variable diameter sections with a small upper part and a large lower part.

4. The diesel engine block with a cooling structure as claimed in claim 3, wherein the distance between the cylinder bores is 300 mm.

5. The diesel engine body with a cooling structure as set forth in claim 1, wherein four arc-shaped reinforcing ribs are fixedly installed between the partition plate and the crankcase.

6. The diesel engine body with a cooling structure as claimed in claim 5, wherein the thickness of the partition plate is 20mm, the thickness of the rib is 20 to 21mm, and the radius of the transition arc of the rib is 580 to 600 mm.

7. The diesel engine block with a cooling structure as claimed in claim 1, wherein the distance between the cylinder bores is 300 mm.