External cooling equipment for lubricating oil of compressor

Abstract

The utility model relates to external lubricating oil cooling equipment for a compressor, and belongs to the field of lubricating oil cooling during operation of the compressor. The device comprises a thin oil station, a gear oil pump, a refrigeration compressor, a temperature controller, a condenser, a strong exhaust fan and an evaporator, hot oil of the thin oil station is sucked in through the gear oil pump, the hot oil is cooled by the evaporator and then flows back to the thin oil station, and a refrigerant of the evaporator is changed into a gas state after exchanging heat and then enters the refrigeration compressor. The refrigeration compressor is pressurized and then passes through the condenser, heat is exhausted through the strong exhaust fan, the condenser is connected with the evaporator, and the temperature controller is arranged between the condenser and the evaporator. The device is reasonable in structural design, safe and reliable, operation is simplified, cost is saved, lubricating oil failure risks are reduced, and use requirements are met.

Description

Technical Field

[0001] The utility model relates to a cooling device, in particular to an external cooling device for compressor lubricating oil, which belongs to the field of lubricating oil cooling during compressor operation, and in particular uses an external device for cooling when the equipment cannot be rebuilt or the oil temperature requirement cannot be met. Background Art

[0002] When the main shaft of a reciprocating compressor is running, the main shaft is subjected to large alternating loads and friction wear. The solid shaft and the bearing cannot be in direct contact during operation. Lubricating oil must be injected between the two through a screw oil pump to create an oil film between the shaft and the bearing to reduce the wear and functional consumption between the relative friction surfaces. At the same time, it also plays a role in cooling the friction surfaces of the moving parts and taking away the debris. Excessive heat will be generated during operation. Usually, in order to maintain the normal operation of the equipment, it will be cooled. External mobile cooling equipment can better cool the oil tank.

[0003] Our reciprocating compressors are the primary equipment for compressing gas throughout the entire production system. Due to the large differential between suction and discharge pressures, they cannot be compressed into process gas in a single pass. Instead, they employ a multi-stage, segmented compression method for progressively increasing pressure. The rotation of the main motor drives the crankshaft's connecting rod mechanism, converting the crankshaft's rotational motion into reciprocating piston motion. Because the main shaft is subject to significant alternating loads and frictional wear, direct contact between the shaft and bearings is not an option. Lubricating oil must be injected between the two via a screw pump to create an oil film between the shaft and bearings, reducing wear and tear on the opposing friction surfaces. This oil film also cools the friction surfaces of the moving parts and removes wear debris.

[0004] Therefore, the lubricant must not only have certain performance characteristics but also sufficient oil volume and pressure. The compressor's lubricating oil tank volume and water cooling system are fixed, and changing the tank volume or replacing the water cooling system would be costly. When the ambient temperature is below 35°C, the existing water cooling system is generally sufficient to cool the lubricant. However, when the ambient temperature rises above 35°C, the oil tank temperature, after cooling by the water cooling system, can reach 50-55°C, approaching the critical temperature for lubricant deterioration. Without artificial heat extraction and cooling for replacement, the lubricant's service life is halved for every 5-10°C increase in temperature above 60°C, and viscosity decreases, leading to a thinning of the lubricating oil film. If the oil film is too thin, it will be insufficient for lubrication protection, or it will be difficult to form, resulting in poor protection. Consequently, lubricated components such as the spindle, crosshead, and connecting rod are more susceptible to wear and scratching. Using external mobile cooling equipment can better cool the oil tank.

[0005] According to the refrigeration system principle, low-temperature, low-pressure liquid refrigerant exchanges heat with the surrounding oil in the evaporator, absorbing the oil's heat and evaporating into a low-temperature, low-pressure gas. The cooling effect is achieved with a total power of 3 kW / h for the entire cooler. The oil pump, compressor, and evaporator are mounted on a public mobile platform. The platform is compact and lightweight, allowing for easy movement and single-person operation. This significantly saves costs and reduces the risk of lubricant failure. Utility Model Content

[0006] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a compressor lubricating oil external cooling device which has a reasonable structural design, is safe and reliable, simplifies operation, saves costs, and reduces the risk of lubricating oil failure.

[0007] The technical solution adopted by the utility model to solve the above-mentioned problem is: the compressor lubricating oil is externally cooled, including a thin oil station and a gear oil pump, the hot oil of the thin oil station is sucked in by the gear oil pump, and is characterized in that it also includes a refrigeration compressor, a thermostat, a condenser, a forced exhaust fan and an evaporator, the hot oil is cooled by the evaporator and then flows back to the thin oil station, the refrigerant in the evaporator is converted into a gaseous state after heat exchange and is sent to the refrigeration compressor, the refrigeration compressor is pressurized and then passes through the condenser and the heat is discharged by the forced exhaust fan, the condenser is connected to the evaporator, and the thermostat is arranged between the condenser and the evaporator.

[0008] Preferably, the thermostat of the present invention is provided with a room temperature sensor, an oil outlet sensor and an oil inlet sensor.

[0009] Preferably, the present invention further comprises temperature regulators installed at both the oil inlet and the oil outlet; the oil inlet temperature can be detected in real time and the oil outlet temperature can be controlled to prevent the lubricating oil from becoming viscous due to excessively low temperature.

[0010] Preferably, the present invention further comprises a pressure reducer, which is arranged between the condenser and the thermostat.

[0011] Compared with the existing technology, the utility model has the following advantages and effects: the overall structural design is reasonable, and it is mainly used for cooling the compressor lubricating oil, which simplifies the operation, saves costs, and reduces the risk of lubricating oil failure; after heat exchange treatment in the refrigeration system, the cooled oil returns to the oil tank through the oil outlet pipeline, and the oil temperature of the entire oil tank is continuously reduced through the continuous circulation of the oil, thereby achieving a cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0013] In the figure: gear oil pump 1, refrigeration compressor 2, thermostat 3, condenser 4, forced exhaust fan 5, evaporator 6, thin oil station 7, pressure reducer 8, refrigerant 9, universal wheel 10; room temperature sensor 31, oil outlet sensor 32, oil inlet sensor 33; oil inlet Y1, oil outlet Y2, intake X1, exhaust P1. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0015] Example

[0016] See also Figure 1 In this embodiment, the external cooling device for the compressor lubricating oil includes a gear oil pump 1, a refrigeration compressor 2, a thermostat 3, a condenser 4, a forced exhaust fan 5, an evaporator 6 and a thin oil station 7. The hot oil in the thin oil station 7 is sucked in by the gear oil pump 1. After passing through the evaporator 6, part of the hot oil goes to the thin oil station 7, and the other part exchanges heat with the refrigerant 9 of the evaporator 6 and becomes gaseous and goes to the refrigeration compressor 2. After the refrigeration compressor 2 is pressurized, it passes through the condenser 4 and the heat is discharged by the forced exhaust fan 5. The condenser 4 is connected to the evaporator 6. The thermostat 3 is arranged between the condenser 4 and the evaporator 6; the pressure reducer 8 is arranged between the condenser 4 and the thermostat 3.

[0017] In this embodiment, the thermostat 3 is provided with a room temperature sensor 31 , an oil outlet sensor 32 and an oil inlet sensor 33 .

[0018] The working process of this embodiment is as follows: after the power switch is turned on, the gear oil pump 1 starts working in advance. If the oil pump motor runs for 10-15 seconds without detecting any load, it will automatically stop and alarm. When the load is detected and the pressure is normal, the refrigeration compressor 2 automatically starts. At this time, the oil outlet temperature can be set by the thermostat 3. After the temperature setting is completed, the condenser 4 detects that the oil temperature exceeds the set temperature and the forced exhaust fan 5 starts. The hot oil and the refrigerant exchange heat in the evaporator 6 and then flow back to the oil tank through the oil outlet. This reciprocating process reaches the set oil temperature.

[0019] The hot oil in the thin oil station 7 of this embodiment is sucked in by the gear oil pump 1 built into the cooler; the hot oil removes heat through the evaporator 6 and then flows out from the oil outlet Y2; the refrigerant 9 through the evaporator 6 exchanges heat and becomes gaseous, is pressurized by the refrigeration compressor 2, passes through the condenser 4, and is removed heat by the forced exhaust fan 5 before being sent to the evaporator 6 to exchange with the hot oil, thus circulating; the forced exhaust fan 5 draws air X1 from the side and exhausts air P1 from the top of the condenser 4.

[0020] In this embodiment, both the oil inlet Y1 and the oil outlet Y2 are equipped with temperature regulators, which can detect the oil inlet temperature in real time and control the oil outlet temperature to prevent the lubricating oil from becoming viscous due to low temperature. The temperature regulator can adjust the temperature manually or automatically.

[0021] In this embodiment, the gear oil pump 1 continuously extracts hot oil from the oil tank, and heat exchange is performed through the refrigeration system (evaporator 6 or refrigerator). The oil cooled by the forced exhaust fan 5 returns to the oil tank through the oil outlet pipe. Through the continuous circulation of the oil, the oil temperature of the entire oil continues to drop, achieving a cooling effect.

[0022] In this embodiment, a plurality of movable universal wheels 10 are provided at the bottom of the external cooling device for the compressor lubricating oil.

[0023] The current operating status of the equipment in this embodiment: after using the external cooler, there is no oil temperature high limit alarm, and the oil pressure is controllable and adjustable within the standard range.

[0024] Through the above description, those skilled in the art can already implement it.

[0025] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is merely an example of the structure of the utility model. Any equivalent changes or simple changes made based on the structure, features and principles described in the concept of the utility model patent are included in the scope of protection of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should fall within the scope of protection of the utility model.

Claims

1. An external cooling device for compressor lubricating oil, comprising a thin oil station (7) and a gear oil pump (1), wherein the hot oil of the thin oil station (7) is sucked in by the gear oil pump (1), and is characterized in that: The invention also includes a refrigeration compressor (2), a thermostat (3), a condenser (4), a forced exhaust fan (5) and an evaporator (6). The hot oil is cooled by the evaporator (6) and then flows back to the thin oil station (7). The refrigerant in the evaporator (6) changes into a gaseous state after exchanging heat and flows to the refrigeration compressor (2). The refrigeration compressor (2) is pressurized and then passes through the condenser (4) and the forced exhaust fan (5) discharges heat. The condenser (4) is connected to the evaporator (6), and the thermostat (3) is arranged between the condenser (4) and the evaporator (6).

2. The compressor lubricating oil external cooling device according to claim 1, characterized in that: The temperature controller (3) is provided with a room temperature sensor (31), an oil outlet sensor (32) and an oil inlet sensor (33).

3. The compressor lubricating oil external cooling device according to claim 1, characterized in that: It also includes temperature regulators installed at the oil inlet (Y1) and oil outlet (Y2).

4. The compressor lubricating oil external cooling device according to claim 1, characterized in that: It also includes a pressure reducer (8), which is arranged between the condenser (4) and the temperature controller (3).

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