CN201057131Y - Improved design of drip-injection type lubricating system of compressor - Google Patents

Abstract

The utility model provides a compressor instillation formula lubricating system's transformation design, relates to a compressor lubricating system technical field. The lubricating device is mainly characterized in that outlets of the oil filling pumps are connected together through oil filling pipes, and lubricating points are lubricated through a filter, a distributor, a check valve and a matcher; the distributor is connected with the oil-free flow sensor and the control cabinet. The design adopts the mode that the outlets of the oil injection pumps are connected and then enter the distributor, and the distributor lubricates lubricating points, so that the reliability of a lubricating system of the unit is improved; by changing the installation position of the check valve and installing the matcher, the service life of the check valve is prolonged, and cylinder pulling accidents are prevented from happening. An oil-free flow sensor is installed, oil-free flow protection can be carried out on all lubricating points, unattended operation is realized, and safety production is ensured. The adjustable oil injection quantity is small, the structure is simple, the design is reasonable, the original oil pump is fully utilized, and the cost is low. Can save a large amount of maintenance cost and has obvious economic benefit.

Description

Retrofit Design of Drip Lubrication System for Compressor

technical field

The utility model relates to the technical field of a compressor lubricating system.

Background technique

The drip lubrication system in the domestic CNG compressor unit adopts the pump-to-point lubrication method, that is, an oil injection pump delivers lubricating oil to a lubrication point through an oil injection pipe. This lubrication method has many disadvantages: (1) There are many pump heads If there are several lubricating points on one compressor, several oil injection pumps and corresponding oil injection pipelines must be installed, so there will be more leakage points. (2) Manual adjustment of the oil supply is inaccurate; (3) Because there is no no-flow alarm function, once the lubricating oil is cut off for some reason, the staff cannot find it in time, and it is very easy to cause a cylinder accident; (4) Due to the original design The check valve is directly installed on the cylinder block. When the compressor is working, the seal and spring of the check valve must not only follow the piston to do the same frequency movement, but also be impacted by the high temperature and high pressure gas in the cylinder (~ 25MPa, ~170°C, ~700RPM), it is very prone to fatigue damage and failure (leakage), and in severe cases, it will cause poor lubrication of the cylinder of the unit and cause cylinder scuffing. After the equipment is shut down, the lubricating oil in the oil injection pipe will leak due to the poor sealing of the check valve, forming the phenomenon of "empty pipe section". 10 seconds), it is not enough to fill the "empty pipe section" with lubricating oil from the oil injection pump, and the main engine has started, which is very easy to cause abnormal wear of the piston ring and cylinder due to dry friction, and in severe cases, it will cause cylinder scuffing. (5) In this "one-to-one" or "point-to-point" traditional oiling method, one single pump fills one lubricating point. If the pump fails or the oiler is not refueled in time, etc.), the oil cannot be supplied normally, and the cylinder is inevitable due to poor lubrication.

Utility model content

The purpose of the utility model is to provide a modification design of a dripping lubrication system of a compressor which has reliability, long service life, and can avoid cylinder pulling accidents due to poor lubrication.

The technical solution of the utility model is achieved in this way. A modified design of a compressor drip lubrication system is connected by an oil injection pump, an oil injection pipe, and a check valve through threads. The special feature is that each oil injection pump The outlets are connected together through the No. 1 oil injection pipe, the No. 1 oil injection pipe is connected to the inlet of the distributor, the outlet of the distributor is connected to the check valve through the No. 3 oil injection pipe, and the check valve is connected to the lubricating point through a matching adapter.

Among the above technical solutions, the special feature is that the oil-free flow sensor is installed in the distributor and connected with the control cabinet through wires.

Among the above technical solutions, the special feature is that a filter is installed between the No. 1 oil injection pipe and the No. 2 oil injection pipe, and the No. 2 oil injection pipe is connected with the inlet of the distributor.

The benefits of the utility model are: (1) This design adopts the way that the outlets of the oil injection pumps are connected and then enter the distributor, and the distributor then lubricates the lubrication points, so that a certain oil injection pump will not be affected by a problem with one oil injection pump. The lubrication of the lubrication point improves the reliability of the lubrication system of the unit; (2) By changing the installation position of the check valve, the installation position of the check valve is moved from the cylinder to the outside of the cylinder, and the check valve passes through the adapter and the lubrication point It can avoid direct contact between the check valve and the compressed medium (especially high temperature and high pressure gas), thereby protecting the check valve, prolonging the service life of the check valve, and preventing the occurrence of cylinder scuffing accidents. After the compressor unit stops, the vertical through hole in the adapter can maintain a certain height of the lubricating oil liquid column, ensuring that the pumped lubricating oil fills the pipeline, avoiding dry friction between the piston ring and the cylinder during the start-up of the main engine. (3) There is an indicator rod on the distributor. When the lubrication is normal, the indicator rod moves back and forth at a certain speed. You can judge whether the oil injection pump is normal by observing the movement frequency of the indicator rod. If there is any damage, the movement frequency of the indicator rod It will be reduced, and problems can be found in time. (4) There is also a safety diaphragm on the distributor. When the system is over-pressurized, the safety diaphragm ruptures to prevent the system from being damaged. (5) No oil flow switch is installed, which can implement no oil flow protection for all lubricating points. Once the lubricating oil is cut off, it can alarm. Realized unattended, to ensure safe production. (6) The outlets of the distributor can be designed with different oil injection volumes, which can meet the requirements of different lubrication volumes of the cylinder and piston rod, and the oil injection volume of each outlet of the distributor can be adjusted in equal proportions by adjusting the oil injection volume of a single pump. (7) The structure is simple, the design is reasonable, the original oil pump is fully utilized, and the cost is low. It can save a lot of maintenance costs, and the economic benefits are obvious.

Description of drawings

Fig. 1 is a schematic diagram of the connection structure of the present invention.

Fig. 2 is a schematic cross-sectional view of the connection of the check valve, the matching device and the lubricating point of the horizontal cylinder in the present invention.

Fig. 3 is a schematic cross-sectional view of the connection of the check valve, the matching device and the lubrication point of the vertical cylinder in the present invention.

Detailed ways

Taking the L-12/5-250 natural gas compressor as an example, there are 6 oil injection pumps 8 (only 3 are shown in the figure), the inlets of which are connected to the oil tank 9, and the outlets of the oil injection pump 8 are connected to the No. 1 oil injection pipe 7 are connected together by threads, No. 1 oil injection pipe 7 is connected with filter 5, No. 2 oil injection pipe 6, and distributor 1 by threads in turn (if it can be ensured that there is no impurity in the lubricating oil, filter 5 may not be installed), in order To facilitate the understanding of the pressure in the oil injection pipe, a pressure gauge can be installed on the No. 2 oil injection pipe 6 . Distributor 1 selects the imported product for use. The outlet of the distributor 1 is connected to the check valve 10 through the No. 3 oil injection pipe, and the check valve 10 is connected to the matching device 12 through the No. 12 are connected together), the matching device 12 is connected with the horizontal lubrication point 11 to lubricate the friction surface between the cylinder and the piston 17. Each of the above joints can be a threaded joint. In order to ensure the tightness of the joint, it can be clamped with a tapered steel ferrule. The other outlet of the distributor 1 can be connected with the check valve 13 through the No. 5 oil filling pipe, and the check valve 13 is connected with the adapter 14 and the vertical lubricating point 15 to lubricate the friction surface between the cylinder and the piston 16. There are multiple lubricating points on one compressor, all of which can be connected through the outlets on the oil filling pipe, matching device, check valve and distributor respectively. The matcher is a communication device with a vertical through hole inside, which can ensure that the check valve and the oil injection pipe between the check valve and the distributor are filled with lubricating oil. If the space on a lubricating point is too small to install a matching adapter, the outlet of the check valve can be connected to the lubricating point through the oil filling pipe, but at this time the oil filling pipe connected to the outlet of the check valve should have a section of 20- The 50 mm vertical pipe acts the same as the adapter. Through them, the check valve and the cylinder can be isolated to ensure that there is a lubricating oil column with a certain height (depending on the pressure of the cylinder) between the check valve sealing surface and the cylinder, and the gas medium (especially the high temperature and high pressure gas medium) is separated from the cylinder. The check valve is in direct contact, which can improve the reliability and service life of the check valve. The lubricating oil pumped out by multiple oil injection pumps 8 is collected in the oil injection pipe 7, and enters the distributor 1 after passing through the filter 5. It is composed of a group of interlocking plungers. A plunger, the plunger closes or opens the lubrication channel during the movement, and sends the oil to each lubrication point in a certain order and in a certain amount. Install the no-oil flow sensor 2 of model 806 in the distributor 1, and connect the no-oil flow sensor 2 to the PLC module in the control cabinet through the wire 3. Because the distributor plunger group is linked, as long as one plunger is stuck, it will block the oil circuit, causing the other plungers to stop moving and cut off the oil. At this time, the contact of the alarm switch is closed to trigger an alarm shutdown. The oil injection volume of each outlet of the distributor can be designed according to the demand of each oil injection point, which can meet the different lubrication requirements of the cylinder and piston rod, and the oil injection volume of each outlet of the distributor can be adjusted proportionally by adjusting the oil injection volume of a single pump.

Claims (3)

1. A modified design of a compressor drip lubrication system, which is connected by an oil injection pump (8), an oil injection pipe, and a check valve (10) through threads, and is characterized in that the outlets of each oil injection pump pass through No. 1 oil injection pipe (7) are connected together, No. 1 oil injection pipe (7) is connected to the inlet of distributor (1), and the outlet of distributor (1) is connected to check valve (10) through No. 3 oil injection pipe, check valve (10) is connected through No. 4 oil injection pipe, matching device (12) and lubricating point (11). 2. According to claim 1, the modified design of drip lubrication system for compressors is characterized in that the oil-free flow sensor (2) is installed in the distributor (1), and is passed through the wire (3) and the control cabinet (4) ) are connected. 3. According to claim 1 or 2, the transformation design of the dripping lubrication system of the compressor is characterized in that a filter ( 5), the No. 2 oil injection pipe (6) is connected with the inlet of the distributor (1).

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