CN2160038Y - Plain top double way assembly steam room expanding ring for steam engine - Google Patents

Abstract

The utility model relates to a plain top double-way assembly steam room expanding ring for a steam engine. The utility model is suitable for steam room valve wheels for railway steam engines. The utility model prevents new steam from leaking in the condition of not working. The utility model belongs to an engine part. The utility model is composed of Z-shaped close opening cast-iron circular rings in an upper and lower plain top type. Each circular ring is 10 mm wide, and is from 10 mm to 11.5 mm thick. According to grades, inner and outer diameters are determined. The free gap of a close opening is 18+/-2 mm, and the working gap is 0.8+/-0.2 mm. Double-way steam room expanding rings are all installed inside a steam feeding expanding ring groove of the valve wheel and a steam charging expanding ring groove of the valve wheel. Compared with the original expanding ring in an inclined top type, the utility model has the advantages that vapor density of the steam engine can be increased, the problem that leakage second number of the steam room is lower than the trade standard can be solved, energy can be saved, and processing is easy.

Description

Plain top double way assembly steam room expanding ring for steam engine

The utility model steam locomotive plain top double way assembly steam room piston ring is applicable to that railway steam vehicle Te Shi steam valve prevents steam leakage, belongs to railway locomotive parts category.

The Te Shi valve of China railways steam locomotive steam chest wheel is gone up the steam chest piston ring of assembling at present, it heals up and adopts whole inclined opening type, in two steam packing ring grooves of Te Shi valve wheel, the single track piston ring only is installed all, this mode causes the place's leak pressure steam that heals up that is assemblied in steam chest internal valve wheel piston ring, steam packing is of poor quality, and steam chest steam leakage number second is lower than portion, office's standard for a long time, thereby influences the performance of the locomotive thermal efficiency, the heat of most of steam is discharged from and leaks away, waste coal, water.

The purpose of this utility model is exactly will overcome the assembling of above-mentioned piston ring and the form of healing up to cause the many shortcomings of steam leakage, design a kind of steam chest steam leakage number second that can make and meet or exceed portion, office's standard, improve the steam locomotive thermal efficiency, reduce locomotive coal, water consumption, process easy steam chest piston ring.

The purpose of this utility model can realize in the following manner, (1) still adopts the material of former steam chest piston ring and annulus basic shape, size promptly: adopt common grey iron HT20-40, have the annulus that heals up, ring width 10mm, thick 10～11.5mm, transform the shape of healing up of this annulus, by former whole inclined opening type (60 ° at tilt angle), change that to open both direction on the relative position of inside and outside circular arc opposite into

The type breach is put down up and down and is taken degree of lip-rounding formula, takes a mouthful long 5mm, and the free open gap is 18 ± 2mm, and the work joint gap is 0.8 ± 0.2mm; Repair system by grade, the piston ring external diameter is divided into 15 grades, and differential 0.5mm, internal diameter are 3 grades, differential 3mm; (2) widen two steam packing ring grooves that the Te Shi valve is taken turns, two pass steam chest piston ring respectively is installed in each groove, steam discharge, constant to the vapour ring groove is still respectively installed two pass steam chest piston ring.

Adopt the flat fibulae type two pass assembly steam room piston ring of such scheme, can prevent the leakage of initial steam before no work done effectively, steam turbine steam packing quality is increased significantly, steam chest leaks second number and improves 85.7% and 62.5% respectively than portion, office's specified standard; Because steam packing is effective, therefore ten thousand ton kilometre coal consumptions descend, and the water-saving result of economizing on coal is remarkable; This kind piston ring needs with special mould clamp and the processing of common slotting machine except that taking mouth, and remaining part is all identical with inclined opening type steam chest piston ring processing method, and processing technology is easy, easily applies.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is a flat fibulae type steam chest piston ring structural representation, and 1 is the piston ring annulus among the figure, and 2 are The type breach, 3 take mouth for flat up and down, and 4 be joint gap, and 1 represents to take a mouthful length, and d is an internal radius, D is the annulus external diameter;

Fig. 2 is the steam chest piston ring fundamental diagram of plain top double way assembling, and A, B respectively represent a piston ring among the figure, and 5 is Te Shi valve wheel, and 6 is the valve race, and arrow is depicted as the steam flow direction, and valve wheel right side is to the vapour side.

Adopt common grey iron HT20-40 as shown in Figure 1, become annulus by the inside and outside round grade car of piston ring, its external diameter is divided into 15 grades, and differential 0.5mm, internal diameter are 3 grades, differential 3mm, and the thick 10-11.5mm of annulus, wide 10mm process on annulus again

Type is flat up and down takes mouth, takes a mouthful long 5mm, and flat up and down free open gap of taking mouth is 18 ± 2mm, work joint gap 0.8 ± 0.2mm; Widen two steam packing ring grooves of Te Shi valve wheel, respectively reach 20+0.045mm, two pass flat fibulae type steam chest piston ring is installed respectively giving in vapour, steam discharge, the steam packing ring groove of valve wheel.Adopt above-mentioned assembling and take the piston ring of degree of lip-rounding formula, can stop up steam leakage path (referring to Fig. 2) comparatively ideally, when initial steam heals up after the place is full of at outer between piston ring A and steam chest bushing, block by the side of taking mouthful plane and piston ring B, because the pressure of steam is bigger, make small amount of steam enter the space of justifying in the piston ring with valve wheel bottom land 1mm from the side clearance of piston ring A and valve race, blocked by the side of taking mouthful plane and piston ring A of piston ring B again, make the twice piston ring in the groove stop that at twice the effect of steam leakage path is particularly evident.

Claims (2)

1, a kind of railway steam vehicle plain top double way assembly steam room piston ring, for common grey iron HT20-40, have the annulus that heals up, the wide 10mm of annulus, thick 10～11.5mm, at the steam discharge of locomotive Te Shi valve wheel, give in the vapour ring groove twice steam chest piston ring respectively be installed, it is characterized in that: it is opposite that the healing up of this annulus is both direction

The type breach is put down up and down and is taken form, takes a mouthful long 5mm, and free open is 18 ± 2mm, and the work joint gap is 0.8 ± 0.2mm; Two steam packing ring groove width of Te Shi valve wheel are 20+0.045mm, and two pass steam chest piston ring respectively is installed in each groove.

2, plain top double way according to claim 1 assembly steam room piston ring, it is characterized in that: repair system by grade, external diameter is divided into 15 grades, and differential 0.5mm, internal diameter are 3 grades, differential 3mm.

Images