CN205936864U - Double -deck cylinder jacket - Google Patents

Abstract

The utility model relates to a double -deck cylinder jacket, including outer tube and endotheca, the outer tube is located engine body, the outside at the piston is established to interior ways, the endotheca is high chromium white cast antifriction cast iron pipe, the outer tube with endotheca fusion cast process as an organic whole. The utility model discloses have higher wearability, corrosion -resistant and high temperature resistance, long service life can use more than 5000 hours under normal operation simultaneously.

Description

A kind of Double-deck air cylinder set

Technical field

This utility model is related to a kind of cylinder sleeve of piston-cylinder and in particular to a kind of Double-deck air cylinder being made up of two kinds of alloys Set.

Background technology

Cylinder jacket is a cylindrical component, is placed in the cylinder body opening of body, on be fixed by cylinder head, piston exists Its endoporus is reciprocating, has cooling water cooling outside it.The function of cylinder jacket has：1. collectively form cylinder work with cylinder cap, piston Make space；2. the cylinder jacket of trunk piston diesel bears side thrust of piston, becomes the helical pitch of reciprocating motion of the pistons；3. by piston Assembly and the heat of itself pass to cooling water, are allowed to operating temperature suitable；4. the cylinder jacket of two stroke diesel engine is disposed with QI KOU, Opened and closed by piston, realize distribution.

Cylinder jacket is the heart component of electromotor, its inner surface be subject to high-temperature high-pressure fuel gas direct effect, and all the time with piston There is high-speed slide friction in ring and piston skirt；Outer surface is contacted with cooling water, produces serious thermal stress, be subject under the larger temperature difference Cooling water corrosion, thus easily wear and tear, the quality of cylinder jacket quality directly influences assembly performance and the serviceability of electromotor. At present, known cylinder jacket is made by high-phosphorous iron, super boron high-phosphorous iron, but it is wear-resistant, corrosion-resistant, resistance to elevated temperatures Poor, service life is short.Conventional solution has quenches in inner surface of cylinder block nitridation, inner surface of cylinder block sulfurizing, inner surface of cylinder block Fire, sprayed molybdenum etc..But above method is also each defective, such as difference of hardness, thermal shock resistance difference etc., cause that cylinder body time between overhaul is short, the longevity The problems such as order short produces it is impossible to be suitable for well.

Utility model content

In view of this, the purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of anti-wear performance height, makes Double-deck air cylinder set with life-span length.

For realizing object above, this utility model adopts the following technical scheme that：

A kind of Double-deck air cylinder set, including outer tube and inner sleeve, described inner sleeve is high chromium white antifriction cast iron pipe, described outer tube and Described inner sleeve is integrated fusion cast process.

Preferably：The lateral wall of described outer tube is provided with least two annular grooves being parallel to each other, and each described annular is recessed All it is embedded with sealing ring in groove.

Annular groove and sealing ring are equipped with the midfoot support that can form Double-deck air cylinder set, effectively reduce in cylinder jacket Portion is because by high temperature, high compression swelling and the dynamic deformation that produces and when mounted produced static deformation, improve this practicality New stability, extends service life of the present utility model.

Preferably：Described outer tube is 35CrMo structural alloy steel, rustless steel or 45# steel.

35CrMo structural alloy steel has very high static strength, impact flexibility and higher fatigue limit, and quenching degree is relatively 40Cr is high, has high creep strength and creep rupture strength, Long-term service temperature is up to 500 DEG C under high temperature；Rustless steel be have stainless The steel grade of property, has the characteristic of the weak corrosive medium such as resistance to air, steam, water；45# is the trade mark of steel, is a kind of high-quality carbon knot Structure steel, corresponding day mark S45C, American Standard 1045, moral mark C45.

Preferably：In described high chromium white antifriction cast iron pipe, C content contains for 21-23%, Si for 2.8-3.1%, Cr content Measuring as 0.6-0.9%, Mn content is 0.5-0.8%, S content and P content is respectively less than 0.05%.

High chromium white antifriction cast iron, is a kind of function admirable and the anti-friction material especially paid attention to.It is than steel alloy Wearability is much higher, more much higher than the toughness of general white cast-iron, intensity, and it also has good high temperature resistance and anticorrosive concurrently simultaneously Performance, rich chromium cast iron typically refers to be measured between 11-30% containing Cr, alloy white cast iron between 2.0-3.6% for the C content. The C content of this utility model inner sleeve for 2.8-3.1%, Cr content for 21-23%, Si content for 0.6-0.9%, Mn content is 0.5-0.8%, S content and P content are respectively less than 0.05%, and its quality standard is pressed JB5083-91 and GB/T1150-93 and manufactured inspection Test, service life more than 5000 hours under normal operation.

Further：The quenching hardness of described inner sleeve is HRC59-67.

Because outer tube and inner sleeve are by inside and outside layer second pouring molding, and during pouring into a mould twice, there is the regular hour Interval, this requires that inner sleeve has certain elevated temperature strength, good crack resistance, can resist the secondary pulse of molten metal, extend casting The service life of type, and the surface quality of foundry goods can be improved and have certain collapsibility.

Preferably：Several pits are evenly distributed with the internal face of described inner sleeve.

The setting of pit can make the section store lubricating fluid of inner sleeve and piston contact so as to inner wall surface is more readily formed Ink, improves greasy property of the present utility model, decreases to abrasion of the present utility model.

Further：The surface roughness of described inner sleeve internal face is Ra0.4-0.8 μm.

The surface roughness of this utility model inner sleeve internal face is set to 0.4-0.8 μm and is because the neighbouring combustion in cylinder jacket top Burn room, temperature is very high, lubricating condition is very poor, fresh air and unevaporated fuel washes away and dilution can aggravate cylinder jacket upper strips The deterioration of part, makes all in dry friction or semi-dry friction state on cylinder, if now inner sleeve surface roughness is less than 0.4 μm, lives Plug ring is pressed on inner sleeve casing wall in the presence of its own resilient and back pressure, and normal pressure is bigger, and lubricating oil film is formed and holding is got over Difficulty, then more increase the abrasion on cylinder jacket top；If surface roughness is more than 0.8 μm, inner sleeve casing wall is effectively connect with piston Contacting surface is long-pending less, and pressure is bigger, and frictional resistance is bigger, and abrasion is faster.

Preferably：Described interior sleeve wall thickness 7-8mm.

The beneficial effects of the utility model：

1st, this utility model is arranged for double-skin duct, in the part setting high chromium white antifriction cast iron with piston directly contact The inner sleeve of pipe, its hardness is high, and thermal shock resistance is strong, substantially increases the wearability of cylinder jacket, corrosion-resistant and heat-resisting quantity；2nd, simultaneously Interior set arranges pit, is easy to kind of lubricant storage, effectively reduce the friction of inner sleeve and piston；3rd, in addition further in outer tube Outside be provided with least two annular grooves being parallel to each other, be equipped with sealing ring, annular groove in each described annular groove It is equipped with, with sealing ring, the midfoot support forming Double-deck air cylinder set, effectively reduce in the middle part of cylinder jacket because by high temperature, high compression swelling And the dynamic deformation producing and when mounted produced static deformation, improve stability of the present utility model, extend Service life of the present utility model.

To sum up, this utility model has higher wearability, corrosion-resistant and heat-resisting quantity, and long service life simultaneously, just Can use more than 5000 hours under the conditions of often.

Brief description

Fig. 1 is the partial sectional view of an embodiment in this utility model.

In figure：1st, outer tube；2nd, inner sleeve；3rd, annular groove；4th, pit.

Specific embodiment

Below by drawings and Examples, the technical solution of the utility model is described in further detail.

As shown in figure 1, this utility model provides a kind of Double-deck air cylinder set, including outer tube 1 and inner sleeve 2, outer tube 1 is located to be sent out In motivation body, the inwall of inner sleeve 2 is set in outside piston, and inner sleeve 2 is high chromium white antifriction cast iron pipe, and outer tube 1 and inner sleeve 2 are Several pits 4, the surface roughness of inner sleeve 2 internal face are evenly distributed with one fusion cast process, the wherein internal face of inner sleeve 2 For Ra0.4-0.8 μm.

This utility model middle external tube 1 can be 35CrMo structural alloy steel, rustless steel or 45# steel, reducing cost and protecting Preferred 35CrMo structural alloy steel on the premise of card this utility model performance, in order to strengthen anti-wear performance of the present utility model, this In utility model, the C content of inner sleeve 2 for 2.8-3.1%, Cr content for 21-23%, Si content for 0.6-0.9%, Mn content is 0.5-0.8%, S content and P content are respectively less than 0.05%.

This utility model is arranged for double-skin duct, in the part setting high chromium white antifriction cast iron pipe with piston directly contact Inner sleeve 2, its hardness is high, and thermal shock resistance is strong, substantially increases the wearability of cylinder jacket, corrosion-resistant and heat-resisting quantity；Exist simultaneously On the internal face of inner sleeve 2, pit 4 is set, is easy to kind of lubricant storage, effectively reduce the friction of inner sleeve 2 and piston, extend this reality With new service life.

In order that be combined with outer tube 1 even closer of inner sleeve 2 is it is ensured that the quenching hardness of inner sleeve 2 is HRC59-67.

In order to further enhance wearability of the present utility model, corrosion-resistant and heat-resisting quantity, inner sleeve 2 wall thickness is set to 7- 8mm.

In order to extend service life of the present utility model further, strengthen sealing property of the present utility model, outside simultaneously The lateral wall of pipe 1 is provided with two annular grooves being parallel to each other 3, is equipped with sealing ring and (does not show in figure in each annular groove 3 Go out), annular groove 3 and sealing ring are equipped with the midfoot support forming Double-deck air cylinder set, effectively reduce in the middle part of cylinder jacket because being subject to High temperature, high compression swelling and the dynamic deformation that produces and when mounted produced static deformation, improve of the present utility model Stability, extends service life of the present utility model.

This utility model is not limited to above-mentioned preferred forms, and any those skilled in the art open of the present utility model Other various forms of products all can be drawn, however, making any change in its shape or structure, every have and this under showing Technical scheme as application is same or like, all falls within protection domain of the present utility model.

Claims (7)

1. it is characterised in that including outer tube (1) and inner sleeve (2), described inner sleeve (2) resists a kind of Double-deck air cylinder set for high chromium white Mill cast iron pipe, described outer tube (1) and described inner sleeve (2) are formed in one.

2. Double-deck air cylinder according to claim 1 covers it is characterised in that the lateral wall of described outer tube (1) is provided with least two The individual annular groove (3) being parallel to each other, is all embedded with sealing ring in each described annular groove (3).

3. Double-deck air cylinder set according to claim 1 and 2 is it is characterised in that described outer tube (1) is 35CrMo alloy structure Steel, rustless steel or 45# steel.

4. Double-deck air cylinder according to claim 1 and 2 covers it is characterised in that the quenching hardness of described inner sleeve (2) is HRC59-67.

5. Double-deck air cylinder according to claim 1 and 2 covers it is characterised in that uniformly dividing on the internal face of described inner sleeve (2) It is furnished with several pits (4).

6. Double-deck air cylinder according to claim 5 set is it is characterised in that the surface roughness of described inner sleeve (2) internal face For Ra0.4-0.8 μm.

7. Double-deck air cylinder according to claim 1 and 2 set is it is characterised in that described inner sleeve (2) wall thickness 7-8mm.