Air compressor lubricating oil heater

Abstract

The utility model relates to an air compressor lubricating oil heater, and belongs to the technical field of air compressor equipment in the metallurgical industry. According to the technical scheme, the device comprises heating rods (1), cables (2), a groove frame (3), heat preservation cotton (4) and a heating rod cushion block (7), the heat preservation cotton (4) adheres to the outer portion of the groove frame (3), the heating rod cushion block (7) is arranged in the groove frame (3), the heating rods (1) arranged in parallel are arranged on the heating rod cushion block (7), and the two ends of each heating rod (1) are connected with a power source through the cables (2) respectively; the heating rod (1) is a stainless steel dry-burning tubular heating rod; the heating rod (1) is fixed on the heating rod cushion block (7) through the U-shaped clamp (5) and the U-shaped clamp fixing bolt (8); the groove frame (3) is of a rectangular frame structure matched with the air compressor oil tank in boundary dimension. The utility model has the beneficial effects that the influence of high temperature on deterioration, carbonization and cracking of grease can be eliminated, the maintenance workload is reduced, and the heating uniformity of the oil tank is improved.

Description

Technical Field

[0001] The utility model relates to an air compressor lubricating oil heater, belonging to the technical field of air compressor equipment in the metallurgical industry. Background Art

[0002] Air compressors are large-scale equipment, and lubricating oil is a core component that ensures stable operation. It acts as a lubricant during high-speed operation. This is especially true for large-scale equipment, where the rotating shaft and the equipment rely on bearings for support and friction. Poor lubrication can directly lead to bearing wear and heat, which can cause equipment vibration, overheating, and even damage and stalling. The temperature of the lubricating oil is closely related to its viscosity. This key metric is called the viscosity-temperature performance of the lubricant, which measures the change in viscosity with temperature. Better viscosity-temperature performance indicates a smaller change. Conversely, a greater change in viscosity indicates a poorer viscosity-temperature performance. Generally, the viscosity of lubricating oil decreases with increasing temperature. Lubricating oil's function is to form a thin film between frictional parts to provide lubrication. High viscosity makes the film difficult to form, while low viscosity results in a thin film and reduced lubrication effectiveness. Therefore, controlling the viscosity of the lubricant through temperature control is crucial, necessitating temperature control of the lubricant.

[0003] The lubricating oil heater is a key component for providing lubricating oil and maintaining oil temperature. On air compressor equipment, the heater is installed inside the oil tank below the compressor. A hole is drilled in the side of the oil tank to install and secure the heater. The heater includes multiple sets of heating rods and a temperature sensor. The hole is fastened to the heater's external components with bolts and gaskets to prevent oil leakage. The number of heating rods is set based on the oil tank volume and required temperature. Terminals are installed on the heater's external components, along with an on-site temperature display. The heater is controlled based on the temperature display to maintain the lubricating oil temperature between 25°C and 33°C.

[0004] The above heater and control method are the most commonly used heater systems in air compressors. They pose multiple safety risks during operation, causing fatal damage to various parts such as lubricating grease, oil pipelines, air compressor bearings, and motor bearings.

[0005] (1) The heater is installed in the middle of the oil tank, and the auxiliary oil pump inlet pipe is close to the lower part of the oil tank. The heater can heat the grease above the heater. Under the condition of alternating hot and cold circulation, the upper grease is evenly heated to the required temperature, while the lower part of the oil tank is heated slowly.

[0006] (2) The heating temperature of the heater rod can reach up to 80℃ or above. The grease that comes into direct contact with the high-temperature heating rod is easily carbonized and decomposed to form black carbonized substances, which affects the oil quality and is more likely to cause wear on the bearings and bushings when the air compressor is running.

[0007] (3) The heater is too short in length and width, which will result in insufficient heating uniformity, long heating time, and high local temperature when heating the entire fuel tank.

[0008] (4) Inspection and maintenance are difficult. When servicing the heater, the grease in the tank needs to be drained and the heater needs to be removed before maintenance can be performed. This places a heavy workload on the maintenance personnel, wastes a certain amount of grease, and poses a huge risk to the quality of the grease. Utility Model Content

[0009] The purpose of the utility model is to provide an air compressor lubricating oil heater, which can eliminate the influence of high temperature on the deterioration, carbonization and cracking of grease, reduce the maintenance workload, improve the uniformity of oil tank heating, and solve the problems existing in the background technology.

[0010] The technical solution of the utility model is:

[0011] An air compressor lubricating oil heater comprises a heating rod, a cable, a trough frame, thermal insulation cotton and a heating rod pad. The thermal insulation cotton is pasted on the outside of the trough frame, and a heating rod pad is provided inside the trough frame. A plurality of parallel heating rods are provided on the heating rod pad, and both ends of the heating rods are connected to a power supply through cables.

[0012] The heating rod is a stainless steel dry-burning tubular heating rod.

[0013] The heating rod is fixed on the heating rod pad by using a U-shaped clip and a U-shaped clip fixing bolt.

[0014] The trough frame is a rectangular frame structure that matches the external dimensions of the air compressor oil tank.

[0015] The lower part of the trough frame is fixed with trough frame legs.

[0016] The heating rod pad is glued to the bottom of the trough frame with heat-resistant glue.

[0017] The beneficial effects of the utility model are: completely changing the installation form of the heater, adjusting the installation from the inside of the oil tank to the lower part of the oil tank, eliminating the influence of high temperature on the deterioration, carbonization and cracking of oil, reducing the workload during maintenance, and improving the heating uniformity of the oil tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a top view of the utility model;

[0019] Figure 2 This is a lateral side view of the utility model;

[0020] Figure 3 This is a longitudinal side view of the utility model;

[0021] Figure 4 This is a transverse cross-sectional view of the utility model;

[0022] Figure 5 This is a longitudinal sectional view of the utility model;

[0023] In the figure: heating rod 1, cable 2, trough frame 3, insulation cotton 4, U-shaped clip 5, trough frame leg 6, heating rod pad 7, U-shaped clip fixing bolt 8. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and examples.

[0025] Refer to the attached Figure 1-5 A lubricating oil heater for an air compressor comprises a heating rod 1, a cable 2, a trough frame 3, thermal insulation cotton 4 and a heating rod pad 7. The thermal insulation cotton 4 is pasted on the outside of the trough frame 3, and a heating rod pad 7 is provided inside the trough frame 3. Several heating rods 1 are arranged in parallel on the heating rod pad 7, and both ends of the heating rod 1 are connected to a power supply through cables 2.

[0026] In this embodiment, refer to the attached Figure 1-5 The heating rod 1 is a stainless steel dry-burning tube with a length of 2 meters. There are 5 of them in total. Each heating rod has a power of 0.9KW, totaling 4.5KW, which is evenly distributed in the trough frame 3. The trough frame 3 and the trough frame legs 6 are made of ordinary carbon steel structure and are corrosion-resistant. The trough frame 3 is 2.6 meters long, 0.4 meters wide and 0.2 meters high. The heating rod pad 7 is made of heat-resistant insulating material to prevent electric shock during installation and adjustment. The cables 2 at both ends are made of 4mm 2 The copper wire is connected to the external dedicated distribution box and is equipped with an insulating sleeve;

[0027] Taking a coking plant as an example, there are four air compressors in the air compressor station. Each air compressor is equipped with a set of air compressor body, model P300, compressed air flow rate 300Nm³ / min, 1 set of dryer, compressed air processing capacity 300Nm³ / min, and 1 air compression tank with a volume of 50m³. Each air compressor oil tank is equipped with a set of heaters with a power of 4.5KW, and is automatically controlled by the air compressor operation box. The oil tank is 2.9 meters long, 0.6 meters high, and 0.6 meters wide. During the operation of the air compressor, the heater of the 1# air compressor broke down and could not meet the air compressor startup temperature control requirements. After pouring out the oil and disassembling the heater for inspection, it was found that the outer layer of the heater heating rod had a carbonized layer of about 2mm and could no longer be used, which seriously affected the quality of the lubricating oil and could not meet the set temperature required for the air compressor to start. The use of this utility model can well solve the above problems. The specific implementation steps are as follows:

[0028] A. Shut down the air compressor with damaged heater, cut off the power supply to the air compressor, and pour out the oil after the oil tank cools down;

[0029] B. Remove the damaged heater, clean the surface of the heating rod and restore it to its original color;

[0030] C. Untie the power cord of the damaged heater rod and do not use it for heating; only keep the power supply of the temperature sensor;

[0031] D. Reinstall the damaged heater into the fuel tank after repair; refill the oil and filter the oil;

[0032] E. Install the new heater under the oil tank of the No. 1 air compressor. Adjust the height of the pads under the trough support legs to adjust the tightness between the new heater and the oil tank to reduce the heat loss of the heater.

[0033] F. Use a cable to connect the new heater cable to the damaged heater power line to provide power to the new heater;

[0034] G. After checking the tightening status of each position, power on the 1# air compressor as a whole;

[0035] H. Check the oil temperature by observing for 24 hours, using the temperature sensor inside the air compressor oil tank, measuring the outer surface of the oil tank with a temperature gun, etc.;

[0036] I. Check once every 2 hours and find that the oil temperature is always controlled within 25-33℃, and the insulation effect of the heater is good. The temperature of the outer surface of the heater is 1℃ higher than the indoor temperature, and the heat loss is low.

Claims

1. An air compressor lubricating oil heater, characterized by: The invention comprises a heating rod (1), a cable (2), a trough frame (3), thermal insulation cotton (4) and a heating rod pad (7). The thermal insulation cotton (4) is pasted on the outside of the trough frame (3). A heating rod pad (7) is provided inside the trough frame (3). A plurality of parallel heating rods (1) are provided on the heating rod pad (7). Both ends of the heating rods (1) are connected to a power source via cables (2).

2. The air compressor lubricating oil heater according to claim 1, characterized in that: The heating rod (1) is a stainless steel dry-burning tube heating rod.

3. An air compressor lubricating oil heater according to claim 1 or 2, characterized in that: The heating rod (1) is fixed on the heating rod pad (7) by using a U-shaped clip (5) and a U-shaped clip fixing bolt (8).

4. The air compressor lubricating oil heater according to claim 1, characterized in that: The trough frame (3) is a rectangular frame structure that matches the external dimensions of the air compressor oil tank.

5. The air compressor lubricating oil heater according to claim 4, characterized in that: A trough frame support leg (6) is fixed to the lower portion of the trough frame (3).

6. An air compressor lubricating oil heater according to claim 1 or 4, characterized in that: The heating rod pad (7) is glued to the bottom of the trough frame (3) with heat-resistant glue.

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