A cooling structure and method for lubricating oil in a reciprocating compressor

Abstract

This invention discloses a cooling structure and method for lubricating oil in reciprocating compressors, relating to the field of lubricating oil cooling technology for reciprocating compressors. The invention includes a heat dissipation radiator, a liquid distribution disc, a hot and cold isolation disc, and a pressure concave pool component. A pneumatic motor drives a pneumatic fan to generate a high-pressure airflow within the pressure concave pool. The gas rotates and separates in a cooling air generating pipe; low-temperature air is introduced into the heat dissipation radiator area through a cooling air discharge pipe, while high-temperature air is guided out through a conical guide tube, thereby achieving efficient cooling of the lubricating oil. The liquid distribution disc, in conjunction with the axial fan blades, can throw condensate into a water collection tank and discharge it through a drain pipe. A top separation cover, in conjunction with a top arc-shaped plate, achieves air pre-purification and self-cleaning, preventing dust from entering the system.

Description

Technical Field

[0001] This invention relates to the field of lubricating oil cooling technology for reciprocating compressors, specifically to a cooling structure and method for lubricating oil in reciprocating compressors. Background Technology

[0002] Natural gas is typically stored as a liquefied substance. For natural gas to change from a gaseous to a liquid state, it needs to undergo heat exchange with a refrigerant in a heat exchanger to gradually cool and liquefy it. After use, the refrigerant forms a gas-liquid mixture. For the refrigerant to be recycled, gas-liquid separation is necessary; otherwise, the cooling effect will be affected. Currently, the separation method uses a refrigerant compressor in conjunction with a separator. The compressor requires a large amount of lubricating oil during operation. The lubricating oil temperature rises during use, affecting lubrication. Therefore, the lubricating oil needs to be cooled to ensure its effectiveness and the normal operation of the compressor. Traditional lubricating oil cooling mainly relies on simple heat sinks and direct airflow from a fan. To prevent dust from accumulating on the heat sink, a filter is required. While the filter structure can isolate some dust, it requires frequent cleaning and replacement, resulting in high maintenance costs. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides the following technical solution: a cooling structure for lubricating oil in a reciprocating compressor, comprising a heat dissipation radiator connected to the lubricating oil of the reciprocating compressor, a liquid distribution disc above the heat dissipation radiator, a hot and cold isolation disc above the liquid distribution disc, a pressure concave pool above the hot and cold isolation disc, a pressure tank fixedly connected above the pressure concave pool, and a sealing cover plate fixedly clamped between the pressure tank and the pressure concave pool; wherein multiple heat separation components are fixedly and sealedly inserted inside the pressure concave pool, each heat separation component comprising a cold air generating pipe and an air inlet cap coaxially and fixedly connected, wherein the air inlet cap is located inside the pressure concave pool, wherein a cold air discharge pipe is coaxially and suspended at the bottom of the cold air generating pipe, the cold air discharge pipe extends and connects to the bottom of the hot and cold isolation disc, and multiple cold end air inlets are provided on the circumferential surface of the air inlet cap along its own tangential direction.

[0004] Preferably, a tapered guide is fixedly provided at the position where the hot and cold isolation plate contacts all the cold air exhaust pipes, and the tapered guide is fixedly sleeved on the cold air exhaust pipes.

[0005] Preferably, a pneumatic motor is coaxially mounted inside the pneumatic tank, and a pneumatic fan is fixedly installed on the output shaft of the pneumatic motor; a support sleeve is coaxially fitted on the outside of the pneumatic concave pool, and the support sleeve is fixedly installed on the lower surface of the sealing cover plate. An axial flow fan blade is rotatably installed at the bottom of the support sleeve, and the axial flow fan blade is also rotatably engaged with the hot and cold isolation plate. The liquid separating disc is fixedly mounted to the axial flow fan blade through a lifting frame, so that the axial flow fan blade and the liquid separating disc rotate coaxially.

[0006] Preferably, a water collection tank is provided between the heat dissipation radiator and the liquid distribution disc. The water collection tank, the liquid distribution disc, and the heat dissipation radiator are all provided with space to allow airflow. The water collection tank has a circular hole at its center to facilitate airflow to the heat dissipation radiator. A drain pipe is fixedly connected to the water collection tank. The drain pipe and the water collection tank are arranged at an inclination to the horizontal plane, and the inclination direction of the drain pipe and the water collection tank is the same, so that the drain pipe is located at the lower end.

[0007] Preferably, the heat dissipation radiator, water collection tank, and sealing cover are all fixedly installed on the casing. An isolation plate is also fixedly installed in the middle of the inner wall of the casing. The isolation plate and the hot and cold isolation plate are on the same plane. The isolation plate is rotated and sealed on the axial fan blade. The isolation plate divides the interior of the casing into upper and lower spaces. Multiple exhaust ports are opened in the space above the isolation plate of the casing.

[0008] Preferably, a top arc-shaped plate can be fixedly installed on the top of the housing. The top arc-shaped plate is sleeved on the outside of the air pressure tank. A support grid is fixedly installed on the air pressure tank by a flange mounting ring. The flange mounting ring is provided with eight flange holes. A support slide rod is slidably inserted into four of the flange holes. A tension spring is wrapped around each support slide rod. The two ends of the tension spring are fixed to the flange mounting ring and the bottom end of the support slide rod. Multiple through holes are opened on the circumferential surface of the support grid.

[0009] Preferably, a top separation cover is fitted on the outside of the support fence and the air pressure tank. The top surface of the inner wall of the top separation cover is fixedly connected to all the support slide rods. The bottom edge of the top separation cover is in contact with and sealed with the top arc plate. A sealing ring is provided on the bottom edge of the top separation cover to contact and cooperate with the top arc plate.

[0010] Preferably, the circumferential surface of the top separation cover is provided with multiple top air inlets along its own tangential direction, and all the top air inlets are located on the side of the top separation cover near the top arc plate (the top separation cover is divided into two parts from the plane where the flange mounting ring is located, and the top air inlets are located in the part near the top arc plate, that is, the top air inlets are offset from the support grid).

[0011] A method for cooling lubricating oil using a reciprocating compressor lubricating oil cooling structure includes the following steps: S1. Starting the pneumatic motor drives the pneumatic fan to rotate, causing gas to be forced into the pneumatic concave pool along the axial direction of the pneumatic cylinder; S2. The gas enters the inlet cap through the cold end inlet and moves tangentially between the inlet cap and the cold gas generating pipe, forming a rotating flow around the central axis; S3. Under the action of centrifugal force, the gas near the inner wall of the cold gas generating pipe is guided out through the conical guide tube, while the gas near the axis of the cold gas generating pipe enters the cold gas discharge pipe; S4. The gas output from the cold gas discharge pipe is guided to the area below the hot and cold isolation plate, then flows through the liquid separator to the heat dissipation radiator, and passes through the heat dissipation radiator, thereby carrying away the heat transferred by the lubricating oil flowing within it, and then is discharged from the bottom of the heat dissipation radiator. S5. If the gas entering the cooling air generating pipe contains moisture, the water droplets will be thrown against the inner wall of the cooling air generating pipe under centrifugal force and discharged with the gas. Some residual water droplets will hit the liquid separating disc and be thrown into the water collection tank, and finally discharged through the drain pipe. S6. The top air inlet at the top of the casing allows outside air to enter the top separation hood. The air rotates tangentially on the inner wall of the top separation hood. Dust and moisture gradually approach the inner wall of the top separation hood and deposit during the rotation. After separation, the gas located at the center of the support grid is sucked into the air pressure tank. S7. When the deposits on the inner wall of the top separation hood accumulate to a certain extent, the pneumatic motor stops running, and the tension spring drives the support slide rod to move upward, causing the top separation hood to separate from the top arc plate. The deposits slide off the arc surface of the top arc plate under the action of gravity and vibration, completing the automatic cleaning.

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention sets up a pneumatic motor to drive a pneumatic fan, so that a high-pressure airflow is formed in the pneumatic concave pool, and a high-speed rotating vortex separation is achieved in the cold air generating pipe and the air inlet cap, which can separate high-temperature gas and low-temperature gas into layers and ensure that low-temperature gas flows through the heat dissipation radiator; (2) The present invention sets a conical guide at the contact point between the cold air exhaust pipe and the cold and hot isolation plate, which can effectively guide the high-temperature air and low-temperature air to be discharged separately during the gas layering process, avoiding the mixing of cold and hot gases and the resulting decrease in heat dissipation efficiency; (3) The present invention sets up a liquid separator rotating with the axial flow fan blades to rotate coaxially. When the water carried in the gas enters the cold air generating pipe, it will be thrown to the water collection tank and discharged through the drain pipe, thereby avoiding water adhering to the surface of the heat dissipation radiator and effectively preventing water accumulation on the surface of the radiator from reducing heat dissipation efficiency (it is easier for dust to adhere after water accumulates); (4) The combination of the top separation cover and the top arc plate of the present invention forms an air purification and self-cleaning function. Before entering the air pressure tank, the air is separated by centrifugal force to ensure the cleanliness of the air entering the system, thereby reducing the accumulation of dust on the surface of the heat dissipation radiator. Unlike the traditional method that relies on a filter, the opening and closing of the top separation cover is controlled by pressure difference and tension spring, which can automatically discharge the deposited dust and reduce the frequency of manual maintenance; (5) The overall airflow arrangement of the present invention flows from top to bottom. The cold air enters from the top, absorbs heat through the heat dissipation radiator, and is discharged from the bottom of the casing. This avoids the ground dust being adsorbed onto the surface of the heat dissipation radiator with the airflow, effectively solving the problem of filter clogging and frequent cleaning caused by bottom air suction in traditional heat dissipation devices. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 This is a schematic diagram of the internal structure of the top separation cover of the present invention.

[0015] Figure 3 For the present invention Figure 2 Schematic diagram of the structure at point A in the middle.

[0016] Figure 4 This is a schematic diagram of the internal structure of the casing of the present invention.

[0017] Figure 5 This is a schematic diagram of the structure of the air pressure concave pool in this invention.

[0018] Figure 6 This is a schematic diagram of the structure of the cold air generating pipe of the present invention.

[0019] In the diagram: 101-Casing; 102-Top arc plate; 103-Exhaust port; 104-Cold end air inlet; 105-Cooling radiator; 106-Top separation cover; 107-Top air inlet; 108-Drain pipe; 109-Support fence; 110-Support slide bar; 111-Flange mounting ring; 112-Tension spring; 113-Pressure tank; 114-Pressure motor; 115-Isolation plate; 116-Support sleeve; 117-Axial flow fan blade; 118-Water collection tank; 119-Sealing cover plate; 120-Lifting frame; 121-Distribution rotary disc; 122-Hot and cold isolation plate; 123-Pressure concave pool; 124-Cold air generating pipe; 125-Pressure fan; 126-Air inlet cap; 127-Cold air exhaust pipe; 128-Conical guide tube. Detailed Implementation

[0020] The following is in conjunction with the appendix Figures 1-6 The technical solution of the present invention will be further illustrated through specific embodiments.

[0021] This invention provides a cooling structure for lubricating oil in a reciprocating compressor, including a heat dissipation radiator 105 connected to the lubricating oil of the reciprocating compressor. A liquid distribution disc 121 is disposed above the heat dissipation radiator 105, a hot and cold isolation disc 122 is disposed above the liquid distribution disc 121, a pressure concave pool 123 is disposed above the hot and cold isolation disc 122, and a pressure tank 113 is fixedly connected above the pressure concave pool 123. A sealing cover plate 119 is fixedly clamped between the pressure tank 113 and the pressure concave pool 123. Multiple heat separation components are fixedly and sealed within the pressure depression 123. Each heat separation component includes a coaxially fixedly connected cold air generating pipe 124 and an air inlet cap 126. The air inlet cap 126 is located inside the pressure depression 123. A cold air discharge pipe 127 is coaxially and suspended at the bottom of the cold air generating pipe 124, extending to the lower part of the hot and cold isolation plate 122. Multiple cold-end air inlets 104 are arranged along their tangential direction on the circumferential surface of the air inlet cap 126. Conical guides 128 are fixedly fitted onto the cold air discharge pipes 127 at the contact points between the hot and cold isolation plate 122 and each of the cold air discharge pipes 127. A pneumatic motor 114 is coaxially mounted inside the pneumatic tank 113, and a pneumatic fan 125 is fixedly installed on the output shaft of the pneumatic motor 114. A support sleeve 116 is coaxially fitted on the outside of the pneumatic concave pool 123. The support sleeve 116 is fixedly installed on the lower surface of the sealing cover plate 119. An axial flow fan blade 117 is rotatably mounted on the bottom end of the support sleeve 116. The axial flow fan blade 117 is also rotatably engaged with the hot and cold isolation plate 122. The liquid separating disc 121 is fixedly engaged with the axial flow fan blade 117 through the lifting frame 120, so that the axial flow fan blade 117 and the liquid separating disc 121 rotate coaxially. A water collection tank 118 is provided between the heat dissipation radiator 105 and the liquid distribution swivel 121. The water collection tank 118, the liquid distribution swivel 121 and the heat dissipation radiator 105 are all provided with space to allow airflow. The water collection tank 118 has a circular hole at its axis to facilitate airflow to the heat dissipation radiator 105. A drain pipe 108 is fixedly connected to the water collection tank 118. The drain pipe 108 and the water collection tank 118 are arranged at an inclination to the horizontal plane, and the inclination direction of the drain pipe 108 and the water collection tank 118 is the same, so that the drain pipe 108 is located at the lower end. The heat dissipation radiator 105, water collection tank 118, and sealing cover 119 are all fixedly installed on the housing 101. An isolation plate 115 is also fixedly installed in the middle of the inner wall of the housing 101. The isolation plate 115 is on the same plane as the hot and cold isolation plate 122, and the isolation plate 115 is rotated and sealed on the axial fan blade 117. The isolation plate 115 divides the interior of the housing 101 into upper and lower spaces. Multiple exhaust ports 103 are opened in the space above the isolation plate 115 of the housing 101.

[0022] A top arc plate 102 can be fixedly installed on the top of the housing 101. The top arc plate 102 is sleeved on the outside of the air pressure tank 113. A support grid 109 is fixedly installed on the air pressure tank 113 through a flange mounting ring 111. The flange mounting ring 111 has eight flange holes. A support slide rod 110 is slidably inserted into four of the flange holes. A tension spring 112 is wrapped around each support slide rod 110. The two ends of the tension spring 112 are fixed to the flange mounting ring 111 and the bottom end of the support slide rod 110. Multiple through holes are opened on the circumferential surface of the support grid 109. A top separation cover 106 is fitted around the outer side of the support fence 109 and the air pressure tank 113. The top surface of the inner wall of the top separation cover 106 is fixedly connected to all the support slide rods 110. The bottom edge of the top separation cover 106 contacts and seals with the top arc plate 102, and a sealing ring is provided on the bottom edge of the top separation cover 106 to contact and cooperate with the top arc plate 102. Multiple top air inlets 107 are opened along their tangent direction on the circumferential surface of the top separation cover 106. All the top air inlets 107 are located on the side of the top separation cover 106 near the top arc plate 102 (the top separation cover 106 is divided into two parts from the plane where the flange mounting ring 111 is located, and the top air inlets 107 are located in the part near the top arc plate 102, that is, the top air inlets 107 are offset from the support fence 109).

[0023] Reciprocating compressors require a large amount of lubricating oil during operation. The lubricating oil temperature rises during use, affecting lubrication efficiency. Therefore, cooling the lubricating oil is necessary to maintain its effectiveness and ensure normal compressor operation. The lubricating oil is connected to a cooling radiator 105 via an oil pump and pipes (the cooling radiator 105 has an oil inlet and outlet, allowing the lubricating oil inside the reciprocating compressor to flow within it; it should be noted that the cooling radiator 105 is hollow). Thus, the cooling radiator 105 needs to dissipate heat because it absorbs the heat from the lubricating oil. At this point, the pneumatic motor 114 needs to be started. The output shaft of the pneumatic motor 114 drives the pneumatic fan 125 to rotate. The pneumatic fan 125 blows air towards the pressure concave pool 123, creating a high-pressure area inside the pressure concave pool 123. Driven by the pressure, the gas inside the pressure concave pool 123 moves through the cold end air inlet 104 into the inside of the air inlet cap 126. The gas moves tangentially along the inner wall of the air inlet cap 126 through the cold end air inlet 104. Since there are multiple cold end air inlets 104 on each air inlet cap 126, the incoming gas will spirally rotate inside the air inlet cap 126 and the inner wall of the cold air generating pipe 124 (it is necessary to ensure that there is sufficient gas inside the pressure concave pool 123). The gas pressure (using a high-power pneumatic motor 114) causes gas molecules to gather at the inner edge of the cold air generating pipe 124 under centrifugal force during rotation (the specific pressure depends on the gas pressure inside the gas pressure concave pool 123, i.e., the rotational speed of the gas inside the cold air generating pipe 124 and the air inlet cap 126). This results in more gas molecules moving at the inner edge of the cold air generating pipe 124 (indicating intense molecular movement), while relatively fewer gas molecules move near the axis inside the cold air generating pipe 124 (indicating less intense molecular movement). The more intense the molecular movement, the greater the heat of the gas, and vice versa.Therefore, the gas near the inner wall of the cold air generating pipe 124 has a higher heat value than the gas exiting the axis. Consequently, the gas near the inner wall of the cold air generating pipe 124 will move along its original direction towards the conical guide fluid 128 and then exit the cold air generating pipe 124. Meanwhile, the low-temperature gas at the axis will be guided through the cold air exit pipe 127 to the area below the hot and cold isolation plate 122, and then flow out through the gap between the hot and cold isolation plate 122 and the liquid distribution plate 121. (It should be noted that if the gas entering the cold air generating pipe 124 contains moisture, some of the moisture will flow out of the cold air generating pipe 124 with the hot air under centrifugal force, and will not enter the cold air exit pipe 128.) 27. If residual moisture enters the air outlet pipe 127, this water will impact the liquid distribution disc 121 due to inertia and then adhere to it. The liquid distribution disc 121 rotates with the axial fan blade 117, which is blown by the hot air discharged from the air generator pipe 124. The rotation of the axial fan blade 117 will drive the liquid distribution disc 121 to rotate, and the rotation of the liquid distribution disc 121 will carry the water along with it. Under the action of centrifugal force, the water is thrown upwards into the water collection tank 118 and finally falls into the water collection tank 118, and then is discharged through the drain pipe 108. The hot air that passes through the axial fan blade 117 will eventually be discharged through the exhaust port 103. The cold air flowing from between the liquid distribution disc 121 and the hot and cold isolation disc 122 passes through the center of the water collection tank 118, then through the heat dissipation radiator 105, carrying away the heat from the heat dissipation radiator 105, and finally exiting from the bottom of the heat dissipation radiator 105, thereby achieving heat dissipation of the heat dissipation radiator 105 and thus achieving the function of cooling the lubricating oil. Since the airflow is discharged from the bottom of the casing 101, it can prevent dust on the ground from being sucked into the heat dissipation radiator 105, causing a large amount of dust to adhere to the heat dissipation radiator 105 and reducing the heat dissipation energy of the heat dissipation radiator 105 (traditionally, the gas is discharged from the bottom to the top, so a filter screen needs to be installed at the bottom for isolation, which requires cleaning of the filter screen over time).

[0024] In addition, a top arc-shaped plate 102 can be added to the housing 101, and a top separation cover 106 can be added to the pressure tank 113. Specifically, the downward air pressure generated inside the pressure tank 113 will cause the pressure inside the support grid 109 set on the pressure tank 113 to decrease. Therefore, the outside air will enter the top separation cover 106 through the top air inlet 107 along the tangential direction of the inner wall of the top separation cover 106, and then rotate along the inner wall of the top separation cover 106. Therefore, the dust in the air will be separated from the clean air under the action of centrifugal force (the same is true for moisture). Therefore, the support grid 109 located at the axis of the top separation cover 106 will draw in clean air, and then this clean air will enter the pressure tank 113. The dust (or moisture) rotating on the inner wall of the top separation cover 106 will gradually sink into the top arc-shaped plate 102 under the action of centrifugal force and gravity. Over time, the amount of dust deposited on the surface increases, requiring regular cleaning. At this point, simply stopping the pneumatic motor 114 (or operating it at low speed) will result in insufficient negative pressure on the top separation cover 106 to adhere to the surface of the top arc plate 102. This is because, under the action of the tension spring 112, the tension spring 112 pulls the support slide rod 110 upwards, causing the top separation cover 106 to separate from the top arc plate 102. Due to the low pressure difference, the pressure difference on the top separation cover 106 cannot overcome the tension of the tension spring 112. At this point, the bottom of the top arc plate 102 will open, and the deposited dust will slide off the surface of the top arc plate 102 (the surface of the top arc plate 102 is a raised arc shape) under the influence of gravity and vibration (the pneumatic motor 114 operates at low speed, and a vibration unit is installed inside the top arc plate 102).

Claims

1. A cooling structure for lubricating oil of a reciprocating compressor, characterized by: The heat dissipation cold row (105) in communication with the lubricating oil of the reciprocating compressor is provided with a distribution rotary disc (121) above, the distribution rotary disc (121) is provided with a cold and hot isolation disc (122) above, the cold and hot isolation disc (122) is provided with a gas pressure concave pool (123) above, the gas pressure concave pool (123) is fixedly communicated with a gas pressure barrel (113) above, the gas pressure barrel (113) and the gas pressure concave pool (123) are fixedly clamped with a sealing cover plate (119), the gas pressure motor (114) is coaxially and fixedly arranged in the gas pressure barrel (113), and the gas pressure fan (125) is fixedly installed on the output shaft of the gas pressure motor (114). Wherein a plurality of heat separation assemblies are fixedly and sealingly inserted in the gas pressure concave pool (123), the heat separation assembly comprises a cold gas generating pipe (124) and an air inlet cap (126) fixedly and coaxially communicated, wherein the air inlet cap (126) is arranged in the inside of the gas pressure concave pool (123), wherein the bottom of the cold gas generating pipe (124) is coaxially and fixedly arranged with a cold gas exhaust pipe (127), the cold gas exhaust pipe (127) is extended and communicated to the lower side of the cold and hot isolation disc (122), and a plurality of cold end air inlets (104) are arranged on the circumferential surface of the air inlet cap (126) along the tangent direction of itself. The cold and hot isolation disc (122) is fixedly provided with a conical flow guide (128) at the position in contact with all the cold gas exhaust pipes (127), and the conical flow guide (128) is fixedly sleeved on the cold gas exhaust pipe (127); the gas pressure concave pool (123) is coaxially sleeved with a supporting sleeve barrel (116), the supporting sleeve barrel (116) is fixedly installed on the lower surface of the sealing cover plate (119), the shaft flow fan blade (117) is rotatably installed at the bottom end of the supporting sleeve barrel (116), and the shaft flow fan blade (117) is also rotatably matched with the cold and hot isolation disc (122), wherein the distribution rotary disc (121) is fixedly matched with the shaft flow fan blade (117) through the hoisting frame (120), so that the shaft flow fan blade (117) and the distribution rotary disc (121) are coaxially rotated.

2. The temperature reducing structure for lubricating oil of a reciprocating compressor according to claim 1, characterized in that: The water collecting tank (118) is arranged between the heat dissipation cold row (105) and the distribution rotary disc (121), the space allowing airflow to flow is arranged between the water collecting tank (118) and the distribution rotary disc (121) and the heat dissipation cold row (105), and the shaft center of the water collecting tank (118) is provided with a circular hole, so that the airflow flows to the heat dissipation cold row (105), the water collecting tank (118) is fixedly communicated with a drain pipe (108), the drain pipe (108) and the water collecting tank (118) are arranged in an inclined manner with the horizontal plane, and the drain pipe (108) and the water collecting tank (118) are arranged in the same inclined direction, so that the drain pipe (108) is located at the low end position.

3. The temperature reducing structure for lubricating oil of a reciprocating compressor according to claim 2, characterized in that: The heat dissipation cold row (105), the water collecting tank (118) and the sealing cover plate (119) are fixedly installed on the shell (101), a partition plate (115) is further fixedly installed on the inner wall of the shell (101), the partition plate (115) is located at the same plane position as the cold-heat isolation disc (122), the partition plate (115) is rotatably sleeved on the axial flow fan blade (117), and the partition plate (115) divides the space in the shell (101) into two spaces in the upper and lower directions, wherein a plurality of exhaust ports (103) are formed in the space above the partition plate (115) of the shell (101).

4. The temperature reducing structure for lubricating oil of a reciprocating compressor according to claim 3, characterized in that: A top arc-shaped plate (102) is further fixedly installed on the top of the shell (101) and sleeved on the outer side of the air pressure barrel (113), the support fence (109) is fixedly installed on the air pressure barrel (113) through a flange mounting ring (111), eight flange holes are formed in the flange mounting ring (111), four support sliding rods (110) are slidably inserted into the flange holes, a tension spring (112) is sleeved around each support sliding rod (110), and the two ends of the tension spring (112) are fixed to the flange mounting ring (111) and the bottom end of the support sliding rod (110), and a plurality of through holes are formed in the circumferential surface of the support fence (109).

5. The temperature reducing structure for lubricating oil of a reciprocating compressor according to claim 4, characterized in that: A top end separation cover (106) is sleeved on the outer side of the support fence (109) and the air pressure barrel (113), the top surface of the inner wall of the top end separation cover (106) is fixedly connected with all the support sliding rods (110), the bottom edge of the top end separation cover (106) is in sealing contact with the top arc-shaped plate (102), and the bottom edge of the top end separation cover (106) is provided with a sealing rubber ring in contact with the top arc-shaped plate (102).

6. The temperature reducing structure for lubricating oil of a reciprocating compressor according to claim 5, characterized in that: A plurality of top end air inlets (107) are formed in the circumferential surface of the top end separation cover (106) along the tangent direction of the top end separation cover (106), and all the top end air inlets (107) are arranged on the side of the top end separation cover (106) close to the top arc-shaped plate (102).

7. A method for cooling the lubricating oil of a reciprocating compressor using the cooling structure for the lubricating oil of any one of claims 1 to 6, characterized in that, The method comprises the following steps: S1, the air pressure motor (114) is started to drive the air pressure fan (125) to rotate, so that the gas is pressed into the air pressure recess (123) along the axis direction of the air pressure barrel (113); S2, the gas enters the air inlet cap (126) through the cold end air inlet (104) and moves along the tangential direction between the air inlet cap (126) and the cold gas generating pipe (124), so as to form a rotational flow around the central axis; S3, under the action of centrifugal force, the gas close to the inner wall of the cold gas generating pipe (124) is guided to be discharged through the conical flow guide (128), and the gas near the axis of the cold gas generating pipe (124) enters the cold gas discharge pipe (127); S4, the gas output by the cold gas discharge pipe (127) is guided to the lower side of the cold-heat isolation disc (122), then flows to the heat dissipation cold row (105) through the liquid distribution rotary disc (121), passes through the heat dissipation cold row (105), so as to take away the heat emitted by the flowing lubricating oil in the heat dissipation cold row (105), and then is discharged from the bottom of the heat dissipation cold row (105); S5, if the gas entering the cold air generating tube (124) contains moisture, water droplets will be thrown to the inner wall of the cold air generating tube (124) under the action of centrifugal force and discharged with the gas, part of the residual water droplets hit the liquid separation scroll (121) and are thrown into the water collecting tank (118), and finally discharged through the drain pipe (108); S6, the top air inlet (107) at the top of the machine shell (101) makes the external air enter the top separation cover (106), the air rotates along the tangent on the inner wall of the top separation cover (106), the dust and moisture gradually approach the inner wall of the top separation cover (106) and deposit during the rotation, after separation, the gas located at the center position of the support fence (109) is sucked into the air pressure barrel (113); S7, when the deposits on the inner wall of the top separation cover (106) accumulate to a certain extent, the air pressure motor (114) stops running, the tension spring (112) drives the support slide rod (110) to move upward, so that the top separation cover (106) is separated from the top arc plate (102), the deposits fall from the arc surface of the top arc plate (102) under the action of gravity and vibration, and the automatic cleaning is completed.

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