CN2777240Y

CN2777240Y - Counter direction lubricating structure for reciprocating piston type compressor

Info

Publication number: CN2777240Y
Application number: CN 200520039235
Authority: CN
Inventors: 陈晓蓉
Original assignee: DALONG MACHINE PLANT SHANGHAI
Current assignee: DALONG MACHINE PLANT SHANGHAI
Priority date: 2005-01-25
Filing date: 2005-01-25
Publication date: 2006-05-03
Anticipated expiration: 2015-01-25

Abstract

The utility model discloses a counter direction lubricating structure for a reciprocating piston type compressor. The tops of four middle bodies are respectively provided with an oil pipe joint which is connected with a shaft head pump. The utility model can make the highest oil pressure of an outlet of an oil pump first supply the oil to a crosshead crawler shoe rubbing pair and a crosshead pin rubbing pair to ensure the lubrication and the cooling of the crosshead crawler shoe rubbing pair and the crosshead pin rubbing pair. Meanwhile, the strength of a crankshaft is raised, the rigidity of the crankshaft is strengthened and the reliability of the compressor in practical running is ensured.

Description

The reverse-lubricating structure of Reciprocting piston compressor

Technical field

The utility model relates to a kind of Reciprocting piston compressor, particularly relates to the reverse-lubricating structure of Reciprocting piston compressor motion.

Background technique

Compressor is that pressurized gas is so as to improving the machinery of gas pressure.Reciprocting piston compressor be by crankshaft ﹠ connecting with rotatablely moving of bent axle change into piston to-and-fro motion, constantly reduce effective swept volume of cylinder with this to-and-fro motion by piston, thereby reach the purpose that improves gas pressure.The be otherwise known as motion of Reciprocting piston compressor of crankshaft ﹠ connecting is the main load-bearing member of compressor, also is the main member that transmits gas force.Therefore, in the running of compressor, allow crankshaft ﹠ connecting that any problem is arranged anything but,, then can cause complete machine to stop, bring loss for production and operation, have personnel casualty accidents when serious in case occur.For this reason, in the design of compressor, except considering also to need the special lubricating condition of paying attention to motion the intensity of motion movement parts.Because exist many in the motion to making the friction pair of sliding friction mutually.As crankshaft main journal and fuselage main bearing, crank throw neck and big end bearing shell, lining of connecting rod small end and crosshead pin, crosshead crawler shoe and middle body slideway etc.These friction pairs all need to make with lubricator in movement process.Oiling agent has two big benefits, the one, between two friction pairs, form one deck oil film causes part to prevent dry friction damage, newly-generated in addition oil film can also play the effect of cooling, thereby avoids producing thermal expansion and causing the accident of blocking between part to take place owing to friction pair moves mutually.In order to make these friction pairs that sufficient lubricating oil all be arranged, keeping certain clearance and oil pressure between the part of phase mutual friction is the basic assurance that realizes motion pressure lubrication.

Usually compressor all is at first to arrive crankshaft main journal by the pressure oil that oil pump exports by the fuselage inner oil tube, oilhole arrives crank throw neck, connnecting rod big end watt in bent axle then, enter lining of connecting rod small end, crosshead pin place by oilhole in the connecting rod shank again, final centered body slideway is implemented lubricated, promptly usually said " forward is lubricated ".Often in the compressor actual moving process, it is low excessively to occur the lubricant oil oil pressure sometimes, flow is too small, crosshead crawler shoe or middle body slideway be because of machining causes distortion, the lining of connecting rod small end material is not good enough and too high or the like the uncertain factor of specific pressure value, and these factors all might cause the oil mass of terminal friction pair in the oil circuit flow process (lining of connecting rod small end and crosshead pin or crosshead crawler shoe and middle body slideway) too small and finally cause crosshead crawler shoe and crosshead pin rapid wear so that burn grinding, thereby have influenced compressor complete machine reliability of operation and Security.

The model utility content

The technical problems to be solved in the utility model provides a kind of reverse-lubricating structure of Reciprocting piston compressor, and it can effectively solve the problem that crosshead crawler shoe and crosshead pin rapid wear so that burning grind, and guarantees the reliability of compressor in actual motion.

In order to address the above problem, the reverse-lubricating structure of the utility model Reciprocting piston compressor, at the top of four middle bodies an oil connection is set respectively, this oil connection is connected with the spindle nose oil pump, and the friction pair of the crosshead crawler shoe in middle body and the friction pair of middle body slideway, crosshead pin and crankshaft-link rod small end bushing, crankshaft-link rod major part bearing shell and crank throw neck place have the asphalt channel that is communicated with and communicates with described oil connection by oil pipe.

Owing to adopt said structure, lubricant oil is through the spindle nose oil pump, with greater than the pressure of 0.4MPa at first to the friction pair fuel feeding of crosshead crawler shoe and middle body slideway.Then, a part of lubricant oil enters the friction pair that lubricates crosshead pin and lining of connecting rod small end in the crosshead body again.Remaining lubricant oil on the way through the oilhole that runs through between connecting rod small end and major part arrive lubricant oil the terminus--big end bearing shell and crank throw neck place are lubricated, thereby finish whole reverse-lubricating process.Like this, can guarantee certain lubricated and cooling in middle body slideway place at lining of connecting rod small end and crosshead pin or crosshead crawler shoe, avoid crosshead crawler shoe and crosshead pin rapid wear so that burn the problem of grinding, improved reliability and the Security of compressor in actual motion.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is done explanation in further detail:

Fig. 1 is the oil circuit schematic flow sheet of the utility model reverse-lubricating;

Fig. 2 is the actual schematic representation that moves towards of the oil circuit of the utility model reverse-lubricating;

Fig. 3 is the utility model crosshead overall structure oil circuit distribution map;

Fig. 4 is the utility model connecting rod integral structure oil circuit distribution map;

Fig. 5 and Fig. 6 are the assembling schematic representation of whole moving element in fuselage;

Embodiment

In order to ensure the enforcement of reverse-lubricating, as shown in Figure 2, the reverse-lubricating structure of the utility model Reciprocting piston compressor has adopted on the flow direction of oil circuit and structure and the lubricated just in time opposite principle of forward.At the top of four middle bodies 1 oil connection 2 is set respectively, oil connection 2 couples together spindle nose oil pump 4, oil cooler 5 and oil strainer 6 by oil pipe 3.

Consult Fig. 5,6 again, the friction pair of the crosshead crawler shoe 12 (in conjunction with Fig. 3) in middle body 1 and the friction pair of middle body slideway, crosshead pin 8 and lining of connecting rod small end 9, big end bearing shell 10 and crank throw neck place have the asphalt channel that is interconnected and communicates with oil connection 2 by oil pipe.

When being lubricated, lubricant oil is at first by oil pump 4 outlet process oil cooler 5 and oil strainers 6, and the oil connection 2 on the body 1 in being transported to by oil pipe 3, by the oilhole on the middle body 1 lubricant oil is sent to crosshead sliding repeatly 12 thereupon, and it is lubricated and cools off, lubricant oil arrives crosshead pin 8 through the oilhole 13 (in conjunction with Fig. 3) on the crosshead 7 afterwards, promptly lubricated crosshead pin 8 and lining of connecting rod small end 9, moreover oil is transported to this lubricated terminus-connnecting rod big end, and it is lubricated by the oilhole that is positioned at connecting rod shank 11 (in conjunction with Fig. 4) that runs through the connecting rod CONCENTRIC REDUCER.

From the mounting point of said structure and each parts as can be seen, adopted reverse-lubricating, originally the problem of appearance was under control fully in forward is lubricated.While need not external oil pipe again and is lubricated because the utility model crankshaft main bearing 15 has adopted the rolling bearing that carries grease, so also need not to offer the oilhole from main bearing 15 to the crank throw neck on the bent axle.Because bent axle is the considerable main part that closes in the compressor, it is that high speed rotary motion is converted into reciprocating part by crank throw, if therefore there is oilhole to exist on the bent axle, will cause that stress is concentrated, permanent operation can produce fatigue crack, fracture propagation finally might cause the fracture of bent axle, and serious accident takes place thereupon, and this is extremely dangerous.Reverse-lubricating structure of the present utility model has been guaranteed the Security of equipment operation fundamentally stopping the possibility that bent axle produces the generation of fatigue fracture accident.

Adopt lubricant oil flow process figure that the utility model carries out reverse-lubricating as shown in Figure 1.

Claims

1. the reverse-lubricating structure of a Reciprocting piston compressor, it is characterized in that: an oil connection is set respectively at the top of four middle bodies, this oil connection is connected with the spindle nose pump, and the crosshead crawler shoe in middle body and the friction pair of middle body slideway, crosshead pin and crankshaft-link rod microcephaly's friction pair, bent axle major part bearing shell and crankshaft journal place have the asphalt channel that is interconnected and communicates with described oil connection by oilhole.

2. the reverse-lubricating structure of Reciprocting piston compressor as claimed in claim 1 is characterized in that: the main bearing of bent axle adopts the rolling bearing that carries grease.