CN207701324U - A kind of large-scale compressor lubricating system - Google Patents

Abstract

The utility model provides a lubricating system for a large-scale compressor, which includes an oil tank, a driving device, an overflow device, a cooling device, a filtering device, a decompression device, a temperature control valve, a second oil circuit, a pressure control device and a lubricating device. The device includes an auxiliary pump unit and a main pump unit, the auxiliary pump unit is driven by a motor, the main pump unit is installed on the compressor and driven by the compressor, the main pump unit works when the compressor unit is working normally, and the auxiliary pump unit only works when the compressor starts and stops The working time of the auxiliary pump is greatly reduced, the energy consumption of the lubrication system is reduced, and the operating cost of the compressor unit is reduced. At the same time, it cooperates with the pressure control device and the temperature control valve to control the pressure and temperature of the oil flowing into the lubrication device in a closed loop. , to ensure the stable operation of the system.

Description

A Large Compressor Lubrication System

technical field

The utility model relates to the technical field of compressor lubricating systems, in particular to a large-scale compressor lubricating system.

Background technique

Compressor is a driven fluid machine that upgrades low-pressure gas to high-pressure gas. It sucks low-temperature and low-pressure refrigerant gas from the suction pipe, drives the piston to compress it through the operation of the motor, and discharges high-temperature and high-pressure gas to the exhaust pipe. For gas, the compressor unit includes not only the body of the compressor, but also the drive system, lubrication system, sealing system and cooling system. In recent years, due to the development of the chemical industry and the establishment of various large-scale chemical plants and oil refineries, the compressor unit has become a key machine for compressing and transporting various gases in chemical production, and occupies an extremely important position. The process is to compress and transport the gas, and it has been converting energy, so the requirements for auxiliary systems such as lubrication systems, sealing systems and cooling systems are relatively high, especially the lubrication system in the compressor. Lubrication can not only reduce the machine At the same time, it can also play the role of sealing, cooling and reducing running noise. Good lubrication conditions are an important guarantee for the long-term reliable operation of the compressor. The compressor lubrication system can not only adjust and distribute the oil supply of each lubrication point independently quantity, and because there are independent oil pumps, oil tanks, coolers and filters, etc., the lubricating oil can be fully cooled and filtered, so that the oil can be kept clean and relatively constant for a long time. For example, the patent "CN205225626U "Discloses a pre-lubrication integrated system for CNG compressor units, including an oil collecting tank, an explosion-proof motor, and a pre-lubricating oil pump; an explosion-proof motor is installed above the oil collecting tank; the explosion-proof motor is connected to a pre-lubricating oil pump, and an overflow flow valve; the inlet of the pre-lubrication oil pump is connected to the oil inlet pipeline, and the first manual ball valve is installed on the oil inlet pipeline through the first three-way joint; the second three-way joint is connected to the overflow valve; the tail end of the inlet pipeline is installed The second manual ball valve; a Y-type filter is installed between the first and third three-way joints; the outlet of the lubricating oil pump is connected to the oil return line through the third three-way joint; a single-way valve is installed on the oil return line; The end of the oil pipeline is connected to the temperature control valve through the fourth three-way joint. The structure is simple, easy to use, and the parts and connecting pipes in the system are interchangeable. Due to the relatively large installed capacity of the compressor system, appropriate Therefore, the capacity of the driving motor can reach several thousand kilowatts, and the installed capacity of the compressor driving motor is relatively high relative to the actual demand, resulting in relatively large power consumption and high energy consumption of the compressor. In addition, the compressor The power consumption of auxiliary equipment, the operation and maintenance costs of compressors are relatively high, and the burden on enterprises is relatively heavy.

Contents of the invention

In order to overcome the following problems in the prior art, the installed capacity of the compressor system is relatively large, and the installed capacity of the compressor driving motor is relatively high relative to the actual demand, resulting in relatively large power consumption and high energy consumption of the compressor. Coupled with the power consumption of compressor auxiliary equipment, the operation and maintenance costs of compressors are relatively high. The utility model provides a lubricating system for a large compressor, which includes an oil tank, a driving device, an overflow device, a cooling device, a filtering device, a decompression device and a lubricating device, and is characterized in that the driving device includes an auxiliary pump group, a main The pump group and the first oil circuit, the inlet of the auxiliary pump group is connected with the outlet of the oil tank, the outlet of the auxiliary pump group is connected with the inlet of the cooling device, the inlet of the main pump group is connected with the outlet of the oil tank, the The outlet of the main pump group is connected to the inlet of the cooling device, the inlet of the first oil circuit is connected to the outlet of the auxiliary pump group, the outlet of the first oil circuit is connected to the inlet of the main pump group, and when the lubrication system starts, the The auxiliary pump set starts first, the main pump set starts again, and the auxiliary pump set stops working. When the lubrication system stops, the auxiliary pump set starts first, the main pump set stops, and the auxiliary pump set stops working again.

On this basis, the auxiliary pump group includes a motor and a screw pump, and the screw pump is driven by the motor to suck oil from the oil tank.

On this basis, the main pump group is a shaft head pump, which is installed on the shaft end of the compressor drive shaft and driven by the compressor.

On this basis, the drive device also includes a first safety valve and a second safety valve, the inlet of the first safety valve is connected to the outlet of the main pump group, and the outlet of the first safety valve is connected to the oil return of the oil tank. The inlet of the second safety valve is connected to the outlet of the auxiliary pump unit, and the outlet of the second safety valve is connected to the oil return port of the oil tank.

On this basis, it also includes a temperature control valve, the temperature control valve is located between the cooling device and the filter device one, the inlet of the temperature control valve is connected with the outlet of the cooling device, and the outlet of the temperature control valve is connected with the filter device One import is connected.

On this basis, a second oil passage is also included, the inlet of the second oil passage is connected with the inlet of the cooling device, and the outlet of the second oil passage is connected with the temperature control valve.

On this basis, a pressure control device is also included, the pressure control device is located between the decompression device and the lubricating device, and is used for sampling the pressure of the oil entering the lubricating device.

On this basis, the pressure control device includes a first pressure transmitter, a second pressure transmitter and a third pressure transmitter, and the first pressure transmitter, the second pressure transmitter and the third pressure transmitter If any two pressure values in the pressure transmitter reach the set value, the pressure control device considers that the set value has been reached.

Compared with the prior art, the beneficial effects of the utility model are:

1. The combination of the main pump set and the auxiliary pump set is adopted. The auxiliary pump set is driven by a motor. The main pump set is installed on the compressor and driven by the compressor. The main pump set runs when the compressor is working normally, and the auxiliary pump set only It can work when the machine is started and stopped, which greatly reduces the working time of the auxiliary pump and reduces the energy consumption of the lubrication system.

2. Since the main pump unit is installed on the compressor and driven by the compressor, when the whole machine encounters an emergency shutdown such as a power failure, the main pump unit will work together with the compressor idling to provide sufficient lubrication for the compressor to ensure the compressor unit Safe stop to avoid the occurrence of accidents such as grinding tiles due to loss of lubrication when the unit suddenly stops, ensuring the stable operation of the system.

3. Cooperate with the pressure control device and temperature control valve to control the temperature and pressure of the oil flowing into the lubricating device in a closed loop to ensure the stable operation of the system.

Description of drawings

Fig. 1 is the structural representation of the utility model;

In the figure: 1. Oil tank, 2. Driving device, 21. Auxiliary pump group, 22. Main pump group, 23. First oil circuit, 24. First safety valve, 25. Second safety valve, 3. Overflow device , 4, cooling device, 5, filter device, 6, decompression device, 7, temperature control valve, 71, second oil circuit, 8, pressure control device, 81, first pressure transmitter, 82, second pressure Transmitter, 83, the third pressure transmitter, 9, lubricating device

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1, the utility model schematically shows a large-scale compressor lubrication system.

The utility model discloses a large-scale compressor lubrication system, as shown in Figure 1, comprising an oil tank 1, a driving device 2, an overflow device 3, a cooling device 4, a filtering device 5, a decompression device 6, a temperature control valve 7, a Two oil passages 71, a pressure control device 8 and a lubricating device 9, the inlet of the driving device 2 is connected to the outlet of the oil tank 1, the outlet of the driving device 2 is connected to the inlet of the cooling device 4, and the outlet of the cooling device 4 is connected to the inlet of the temperature control valve 7, The outlet of the temperature control valve 7 is connected to the inlet of the filter device 5, the outlet of the filter device 5 is connected to the inlet of the decompression device 6, the outlet of the decompression device 6 is connected to the inlet of the lubricating device 9, and the outlet of the lubricating device 9 is connected to the oil return of the oil tank 1 The inlet of the second oil circuit 71 is connected to the inlet of the cooling device 4, and the outlet of the second oil circuit 71 is connected to the temperature control valve 7; the driving device 2 includes an auxiliary pump group 21, a main pump group 22, a first oil circuit 23 , the first safety valve 24 and the second safety valve 25, the inlet of the auxiliary pump group 21 is connected with the outlet of the fuel tank 1, the outlet of the auxiliary pump group 21 is connected with the inlet of the cooling device 4, the inlet of the main pump group 22 is connected with the outlet of the fuel tank 1 The outlet is connected, the outlet of the main pump group 22 is connected with the inlet of the cooling device 4, the inlet of the first oil circuit 23 is connected with the outlet of the auxiliary pump group 21, the outlet of the first oil circuit 23 is connected with the inlet of the main pump group 22, and the first oil circuit 23 is connected with the inlet of the main pump group 22. The inlet of a safety valve 24 is connected with the outlet of the main pump group 22, the outlet of the first safety valve 24 is connected with the oil return port of the fuel tank 1, the inlet of the second safety valve 25 is connected with the outlet of the auxiliary pump group 21, and the second safety valve 24 is connected with the outlet of the auxiliary pump group 21. The outlet of the valve 25 is connected to the oil return port of the oil tank 1, and the first safety valve 24 and the second safety valve 25 are used to protect the auxiliary pump group 21 and the main pump group 22, so as to avoid damage to the auxiliary pump group 21 and the main pump group 22 due to system failure , the auxiliary pump group 21 includes a motor and a screw pump, the motor drives the screw pump to draw oil from the oil tank 1, and provides oil with a certain pressure for the lubrication system. The main pump group 22 is a shaft head pump, and the shaft head pump is installed on The shaft end of the compressor drive shaft is driven to rotate by the compressor. When the compressor is working, it drives the shaft head pump to rotate together, so that the shaft head pump absorbs oil from the oil tank 1 to provide oil with a certain pressure for the lubrication system. , when the compressor unit starts, the auxiliary pump unit 21 starts first, draws oil from the oil tank 1, provides enough lubricating oil for the compressor, and fills the shaft head pump of the main pump unit 22 with oil through the first oil circuit 23 , to avoid dry friction of oil in the shaft head pump when the compressor is started, and damage the shaft head pump. When the compressor is working normally, the shaft head pump follows the rotation of the compressor, absorbs oil from the oil tank 1, and the auxiliary pump unit 21 stops operation, the shaft head pump is used to provide oil with a certain pressure for the lubrication system. When the compressor unit stops, the auxiliary pump unit 21 starts to ensure the pressure and flow of oil required by the lubrication system, and then the compressor unit starts to stop and idle. When the compressor After complete shutdown, the auxiliary pump unit 21 stops running; the auxiliary pump unit 21 and the main pump unit 22 are used together, the main pump unit 22 is used when the compressor is working normally, and the auxiliary pump unit 21 is used when the compressor starts and stops, greatly reducing The working time of the auxiliary pump group 21 is shortened, the energy consumption of the lubrication system is reduced, and the operating cost of the lubrication system is reduced , and the main pump unit 22 is installed on the compressor and is driven by the compressor. When the whole machine encounters an emergency shutdown such as a power failure, the main pump unit 22 will work together with the compressor idling to provide sufficient lubrication for the compressor to ensure that the compressor unit The safe stop of the unit prevents accidents such as grinding tiles due to loss of lubrication when the unit suddenly stops, and ensures the stable operation of the system. The cooling device 4 is used to cool the oil in the system, and the temperature control valve 7 is used to control the oil entering the system. The temperature control valve 7 is a self-supporting temperature control valve with two inlets and one outlet. The two inlets are respectively connected to the outlet of the second oil passage 71 and the outlet of the cooling device 4. The oil in the second oil passage 71 The liquid is uncooled oil with a high temperature, and the oil in the outlet of the cooling device 4 is oil with a low temperature after cooling. The temperature control valve 7 automatically adjusts the second oil circuit 71 and the cooling device according to the set temperature. 4, so that the temperature at the outlet of the temperature control valve 7 meets the set requirements; the pressure control device 8 is located between the decompression device 6 and the lubricating device 9, and is used to control the pressure of the oil entering the lubricating device 9. When the pressure When it is lower than the set value, start the auxiliary pump group 21 to ensure the pressure of the lubricating oil in the lubrication system. The pressure control device 8 includes a first pressure transmitter 81, a second pressure transmitter 82 and a third pressure transmitter 83 , the first pressure transmitter 81, the second pressure transmitter 82 and the third pressure transmitter 83 are arranged in parallel for sampling the pressure of the oil entering the lubricating device 9, when any of the three pressure transmitters When the two pressure values reach the set value, the pressure control device 8 considers that the set value has been reached, and starts the auxiliary pump group 21, so as to avoid the sampling error of the single first pressure transmitter or the system pressure fluctuation, so that the auxiliary pump group 21 starts frequently , affecting the stability of the system.

This lubrication system adopts the cooperation mode of the main pump unit and the auxiliary pump unit. The auxiliary pump unit is driven by the motor. The main pump unit is installed on the compressor and driven by the compressor. The main pump unit works when the compressor unit is working normally. The compressor works when the compressor starts and stops, which greatly reduces the working time of the auxiliary pump and reduces the energy consumption of the lubrication system. The pump unit will work together with the idling of the compressor to provide sufficient lubrication for the compressor to ensure the safe shutdown of the compressor unit to avoid accidents such as grinding tiles caused by the loss of lubrication when the unit suddenly stops. At the same time, it cooperates with the pressure control device and temperature control The valve ensures the pressure and temperature of the oil flowing into the lubricating device and ensures the stable operation of the system.

The above description shows and describes the preferred embodiments of the present utility model. As mentioned above, it should be understood that the present utility model is not limited to the forms disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various Various other combinations, modifications, and environments can be made within the scope of the inventive concept described herein, by the above teachings or by skill or knowledge in the relevant field. However, changes and changes made by those skilled in the art do not depart from the spirit and scope of the utility model, and should all be within the protection scope of the appended claims of the utility model.

Claims (8)

1. A large-scale compressor lubrication system, including an oil tank (1), a driving device (2), an overflow device (3), a cooling device (4), a filtering device (5), a decompression device (6) and a lubricating device (9), characterized in that: the driving device (2) includes an auxiliary pump group (21), a main pump group (22) and a first oil circuit (23), and the inlet of the auxiliary pump group (21) is connected to the oil tank The outlet of (1) is connected, the outlet of the auxiliary pump group (21) is connected with the inlet of the cooling device (4), the inlet of the main pump group (22) is connected with the outlet of the oil tank (1), and the main pump The outlet of the group (22) is connected with the inlet of the cooling device (4), the inlet of the first oil passage (23) is connected with the outlet of the auxiliary pump group (21), and the outlet of the first oil passage (23) is connected with the The inlets of the main pump group (22) are connected; when the lubrication system is started, the auxiliary pump group (21) is started first, the main pump group (22) is started again, the auxiliary pump group (21) stops working, and when the lubrication system is shut down, all Said auxiliary pump group (21) starts earlier, main pump group (22) stops, and auxiliary pump group (21) stops working again. 2. A large-scale compressor lubrication system according to claim 1, characterized in that: the auxiliary pump group (21) includes a motor and a screw pump, and the screw pump is driven by the motor and sucks oil from the oil tank (1) Oil. 3. A lubricating system for a large compressor according to claim 2, characterized in that: the main pump unit (22) is a shaft head pump installed on the shaft end of the compressor drive shaft and driven by the compressor. 4. A large-scale compressor lubrication system according to claim 3, characterized in that: the driving device (2) also includes a first safety valve (24) and a second safety valve (25), the first The inlet of the safety valve (24) is connected to the outlet of the main pump group (22), the outlet of the first safety valve (24) is connected to the oil return port of the oil tank (1), and the inlet of the second safety valve (25) It is connected to the outlet of the auxiliary pump group (21), and the outlet of the second safety valve (25) is connected to the oil return port of the oil tank (1). 5. A large-scale compressor lubrication system according to claim 4, characterized in that: it also includes a temperature control valve (7), and the temperature control valve (7) is located between the cooling device (4) and the filter device (5) Between, the inlet of the temperature control valve (7) is connected with the outlet of the cooling device (4), and the outlet of the temperature control valve (7) is connected with the inlet of the filter device (5). 6. A large-scale compressor lubrication system according to claim 5, characterized in that: it also includes a second oil passage (71), the inlet of the second oil passage (71) and the inlet of the cooling device (4) connected, and the outlet of the second oil passage (71) is connected with the temperature control valve (7). 7. A lubricating system for a large compressor according to claim 6, characterized in that: it also includes a pressure control device (8), and the pressure control device (8) is located between the decompression device (6) and the lubricating device (9) ), used to control the pressure of the oil entering the lubricating device (9). 8. A large-scale compressor lubrication system according to claim 7, characterized in that: the pressure control device (8) includes a first pressure transmitter (81), a second pressure transmitter (82) and The third pressure transmitter (83), the first pressure transmitter (81), the second pressure transmitter (82) and the third pressure transmitter (83) are arranged in parallel, wherein the pressure of any two When the value reaches the set value, the pressure control device (8) considers that the set value has been reached.