CN2358247Y

CN2358247Y - Air compressor

Info

Publication number: CN2358247Y
Application number: CN 99200832
Authority: CN
Inventors: 邓咏麟
Original assignee: NANKOU ROLLING STOCK PLANT BEIJING
Current assignee: NANKOU ROLLING STOCK PLANT BEIJING
Priority date: 1999-01-26
Filing date: 1999-01-26
Publication date: 2000-01-12
Anticipated expiration: 2009-01-26

Abstract

The utility model relates to an air compressor, which is composed of a machine body (1), a cylinder, an air valve (3), a cooler (4), a piston connecting rod, an oil pump (2), wherein, the cylinder is composed of three first level cylinder (5, 6, 7) and one second level cylinder (8); the included angle of the cylinders is 90 DGR and is of a dual V-shaped structure; the air valve (3) is composed of an air inlet valve and an air exhaust valve; the cooler is composed of an intercooler (12) and an aftercooler (13). The utility model has the characteristics of light weight, small volume, high reliability, and strong durability.

Description

A kind of air compressor

The utility model belongs to the compressed-air power source apparatus in rail vehicles air braking system or other field, and particularly relating to a kind of volume flow is 2.4m ³/ min, working pressure is the air compressor of 0.9Mpa.

The air compressor that uses on the present rail vehicles, volume flow is 2.4m ³/ min, working pressure is 0.9Mpa, form by two one-level cylinders and a secondary cylinder, adopt air-cooled, two stage compression, single-acting formula, interstage cooler is housed between the I and II in air system, air valve adopts the combination cyclic formula, oil bath air cleaner and gear-type oil pump are lubricated, and this air compressor weight and volume is all big, and general weight is 360 kilograms, length is 900 millimeters, and reliability and poor durability.Air compressor in use is that the gas after the secondary compression is directly imported in the piping, and higher delivery temperature generally is to enter behind the natural cooling to use the gas position in gas holder.In recent years the raising to the pressurized air quality requirements has made original air supply system not satisfy, installing compressed air purifier in system additional is the technology that has been widely adopted, and this purification plant generally will be arranged between air compressor and the gas holder, and the air that enters the exsiccator in the purification plant is had temperature requirement.On the other hand, wrist pin and piston pin hole have a small amount of interference, are to be fixed in the piston by hot charging, pin is slidingly matched with wrist pin bush, pin can take place and lose efficacy with the pin-and-hole interference in this structure under abominable operating conditions, cause the hole to be twisted with the fingers card (aluminum piston), damages parts.

The purpose of this utility model provides a kind of air compressor, it have in light weight, volume is little, reliability height, the characteristics that durability is strong.

The purpose of this utility model is achieved in that a kind of air compressor, form by body, cylinder, air valve, cooler, piston rod and oil pump, described cylinder is made up of three one-level cylinders and a secondary cylinder, and angle between banks are 90 degree, become dual V-structure, described air valve is made up of suction valve and outlet valve, and described oil pump is a plunger oil pump.

The utility model compared with prior art has following advantage: 1) owing to adopt the dual V-structure of angle 90 degree, make the axial length of complete machine reduce 300 millimeters, reach 600 millimeters, 130 kilograms of weight savings reach 230 kilograms; 2) owing to adopted the single-acting air valve, be that each cylinder is equipped with into, arranges two air valves respectively, and the inlet and outlet valve is that one group of identical part is formed, compare with the combined type air valve and to have reduced the part kind, increased interchangeability, the cylinder head inner chamber design of joining with the air valve passage more becomes rationally, helps the reduction of delivery temperature; 3) valve block and spring for valve have adopted conjuncted ring-shaped valve respectively and have had the pole panel spring that becomes rigidity work, have improved the air valve service behaviour, 3 to 4 times of the turn(a)rounds of prolongation air valve; 4) owing to improved the pressure ratio of one-level, reduce the secondary pressure ratio relatively, made the gas temperature after the two stage compression approaching, overcome the higher deficiency of known air compressor secondary delivery temperature, compare with the known air compressor, the two-stage delivery temperature reduces by 18 degree and 34 degree respectively; 5) because wrist pin is slidingly matched in piston pin hole, needn't press-fit or hot charging, make the mounting or dismounting work simplification, increase the bearing area and the bearing capacity of bearing, be 1.1 times of known air compressor; 6) adopted middle cooling and the conjuncted cooler of back cooling, the user can save the cooling unit behind the machine; 7) the utility model has designed the air-strainer with noise reduction function, and is filter material with the air filtration paper, makes the sound power level noise figure of complete machine reduce 1.82dB.

Fig. 1 is the main diagrammatic sketch of the utility model air compressor;

Fig. 2 is the side view of the utility model air compressor;

Fig. 3 is the utility model suction valve sectional view;

Fig. 4 is the utility model outlet valve sectional view;

Fig. 5 is the utility model piston rod sectional arrangement drawing;

Fig. 6 is the A-A sectional view of Fig. 5;

Fig. 7 is the stereogram of the utility model cooler.

Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.

The utility model air compressor is made up of body 1,

cylinder

5,6,7,8, air valve 3, cooler 4, as depicted in figs. 1 and 2, by changing the volume flow requirement that rotating speed, number of cylinders, diameter etc. guarantee air compressor, it still is the reciprocating piston type of air-cooled, two stage compression, single-acting formula, the four-cylinder that adopts 5,6,7 and secondary cylinders of three one-level cylinders 8 to form on structural type, angle between banks are the dual V-structure of 90 degree.Oil pump adopts the plunger oil pump 2 that reduced size is arranged at axial direction, makes the axial length dimension of complete machine reach 670 millimeters (can reach 600 millimeters when using the coupling with the known air compressor arrangement), and weight reaches 230 kilograms.

Air valve 3 of the present utility model as shown in Figure 3 and Figure 4, adopt the single-acting air valve, be that each cylinder is equipped with a suction valve 10, outlet valve 11 respectively, lift limiter 18 and valve seat 19, described suction valve 10 and outlet valve 11 are made up of one group of identical part, valve block in suction valve 10, the outlet valve 11 is a kind of ring-shaped valve 16 of three ring joint bodies, and its spring is a pole panel spring 17.

Piston rod as shown in Figure 5 and Figure 6, between wrist pin 20 and pin-and-hole, adopted pin to be fixed in the connecting rod 14 little stomidiums, piston pin hole is pressed into lining, pin is slidingly matched in the piston pin hole lining, and is to make the closed clamping in connecting rod 14 small end open type holes by screwing nut 15 between wrist pin and wrist-pin hole.

Cooler 4 is made up of interstage cooler 12 and aftercooler 13 two-part as shown in Figure 7, and described interstage cooler 12 is the cooling of one-level pressurized gas, and described aftercooler 13 makes the secondary pressurized gas obtain cooling.The part of cooler is as the compressed-air actuated middle cooling of one-level, another part makes the secondary pressurized air of air compressor obtain cooling as the back cooling, back refrigerating function is exactly that pressurized air is first through supercooling before leaving air compressor, the end of a period delivery temperature that makes air compressor is near ambient temperature, and one-level pressurized gas import 21, one-level pressurized gas outlet 22, secondary pressurized gas import 23, secondary pressurized gas export 24.

Claims

1, a kind of air compressor, form by body (1), cylinder, air valve (3), cooler (4), piston rod, oil pump (2), it is characterized in that: described cylinder is made up of three one-level cylinders (5,6,7) and a secondary cylinder (8), and angle between banks are 90 degree, become dual V-structure, described air valve (3) is made up of suction valve (10) and outlet valve (11), and described oil pump (2) is a plunger oil pump.

2, air compressor according to claim 1: it is characterized in that: described cooler (4) is made up of interstage cooler (12) and aftercooler (13) two-part, one-level pressurized gas import (21), the outlet of one-level pressurized gas (22), secondary pressurized gas import (23), secondary pressurized gas outlet (24).

3, air compressor according to claim 1: it is characterized in that: described piston rod assembling is made up of piston (9), wrist pin (20), connecting rod (14) and nut (15), adopt pin to be fixed in connecting rod (14) small end between described wrist pin (20) and pin-and-hole, piston pin hole is pressed into lining, pin is slidingly matched in piston pin hole, makes the closed clamping in wrist-pin end of connecting rod open type hole by nut (15) between wrist pin (20) and the little stomidium of connecting rod (14).

4, air compressor according to claim 1: it is characterized in that: the valve block in the described air valve (3) is a kind of ring-shaped valve (16) of three ring joint bodies, and the spring of air valve (3) is pole panel spring (17).