Direct current winch thin oil lubrication system

Abstract

The utility model relates to petroleum drilling equipment technical field, concretely relates to a direct current winch thin oil lubrication system, including suction filter two, mechanical oil pump and lubricating oil pipeline, one end of suction filter two is connected with oil storage equipment, the other end is connected with mechanical oil pump, and the discharge pipeline of mechanical oil pump is connected with lubricating oil pipeline, lubricating oil pipeline includes lubricating oil pipeline one, lubricating oil pipeline two, lubricating oil pipeline three, lubricating oil pipeline four, lubricating oil pipeline one, lubricating oil pipeline two, lubricating oil pipeline three, lubricating oil pipeline four are used for lubricating respectively input shaft and intermediate shaft between transmission chain, input shaft bearing, intermediate shaft and drum shaft between transmission chain, intermediate shaft bearing seat, the lubricating oil pipeline branch of the present application is into many ways, and the bearing or chain of lubrication is corresponded, and bearing one, bearing two, bearing three, bearing four adopt thin oil forced lubrication, need not regular oiling maintenance again, and the bearing high -speed heat problem caused by the grease lubrication is solved simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling equipment technology, and specifically to a DC winch thin oil lubrication system. Background Technology

[0002] The winch is one of the most important pieces of equipment in an oil drilling rig. Existing DC winches are three-axis winches with internal speed change, wall-mounted design, full enclosure, and chain drive. This means the winch is powered by two motors running in parallel on the input shaft. The combined power is transmitted through chains on both sides to the intermediate shaft, and then through chains on both sides to drive the drum shaft. The sprockets of the input shaft, intermediate shaft, and drum shaft are housed in a chain box, and the bearing housings are fixed to the winch frame. Currently, the chains of DC winches are lubricated with thin oil, and the bearings in the bearing housings are lubricated with grease. The bearings require regular manual lubrication, and improper maintenance, such as missed or excessive lubrication, frequently occurs, leading to winch malfunctions and affecting drilling production. Lip seals are required on both sides of the bearings to prevent grease leakage. These lip seals are wear parts and require regular maintenance and replacement. Due to the structural characteristics of the winch's input and intermediate shafts, replacing the lip seals is very difficult, and the high speed of the winch's input shaft makes grease lubrication prone to causing bearing overheating. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and to propose a thin oil lubrication system for DC winches.

[0004] The technical solution adopted by this utility model to solve its technical problem is: A DC winch thin oil lubrication system includes a second suction filter, a mechanical oil pump, and lubrication oil pipelines. One end of the second suction filter is connected to an oil storage device, and the other end is connected to the mechanical oil pump. The discharge pipeline of the mechanical oil pump is connected to the lubrication oil pipelines. A one-way valve b and a discharge filter are installed on the discharge pipeline of the mechanical oil pump, allowing lubrication oil to flow in only one direction. The lubrication oil pipelines include lubrication oil pipeline one, lubrication oil pipeline two, lubrication oil pipeline three, and lubrication oil pipeline four, which are respectively used to lubricate the transmission chain between the input shaft and the intermediate shaft, the input shaft bearing, the transmission chain between the intermediate shaft and the drum shaft, and the intermediate shaft bearing housing. This invention branches the lubrication oil pipelines into multiple paths, each reaching a preset position and lubricating the corresponding bearing or chain. Furthermore, bearings one, two, three, and four are subjected to forced lubrication with thin oil, eliminating the need for periodic oiling maintenance and simultaneously solving the problem of bearing overheating at high speeds caused by grease lubrication.

[0005] Furthermore, the discharge line of the mechanical oil pump is connected to lubricating oil line one near its end, the end of the discharge line of the mechanical oil pump is connected to lubricating oil line three, lubricating oil line two is connected to lubricating oil line one, and lubricating oil line four is connected to lubricating oil line three.

[0006] Furthermore, the first lubrication line includes lubrication lines A and B for lubricating chains I and II respectively; the third lubrication line includes lubrication lines C and D for lubricating chains III and IV respectively; the second lubrication line includes lubrication lines E and F for lubricating bearings I and II respectively; and the fourth lubrication line includes lubrication lines G and H for lubricating bearings III and IV respectively. Wherein, chain I is a low-speed transmission chain between the input shaft and the intermediate shaft, chain II is a high-speed transmission chain between the input shaft and the intermediate shaft, chain III is a low-speed transmission chain between the intermediate shaft and the roller shaft, chain IV is a high-speed transmission chain between the intermediate shaft and the roller shaft, bearing I is the left bearing housing bearing of the input shaft, bearing II is the right bearing housing bearing of the input shaft, bearing III is the left bearing housing bearing of the intermediate shaft, and bearing IV is the right bearing housing bearing of the intermediate shaft. The mechanical oil pump is located inside the winch base. It draws lubricating oil from the suction filter and discharge filter, and then delivers the lubricating oil through the lubricating oil pipeline to chains I, II, III, IV, and bearings I, II, III, and IV, thereby achieving forced lubrication.

[0007] Furthermore, a pressure gauge, a pressure transmitter, and an overflow valve are installed on the discharge pipeline of the mechanical oil pump. The pressure gauge is used to observe the lubricating oil pressure, the pressure transmitter is used to collect the lubrication system pressure, and the overflow valve is used to regulate the lubrication system pressure.

[0008] Furthermore, the lubrication system also includes a suction filter and an electric gear oil pump. One end of the suction filter is connected to an oil storage device, and the other end is connected to the electric gear oil pump. A one-way valve a is installed on the discharge line of the electric gear oil pump. The electric gear oil pump and its discharge line are connected in parallel with the mechanical oil pump, and the parallel pipeline is connected to a ball valve. The electric gear oil pump serves as a backup oil pump, and it operates independently of the mechanical oil pump without affecting it.

[0009] Furthermore, ball valve one and ball valve two are connected in series before and after the discharge filter, respectively. A bypass branch is provided in parallel with the discharge filter, ball valve one, and ball valve two, and ball valve three is installed on the bypass branch. When the lubrication system is working normally, ball valve one and ball valve two are open, and ball valve three is closed, allowing lubricating oil to pass through the discharge filter. When the discharge filter element is replaced or damaged, ball valve one and ball valve two are closed, and ball valve three is opened, allowing lubricating oil to pass through the bypass branch without passing through the discharge filter. Even if the discharge filter element is replaced or damaged, the lubrication system can still operate to ensure the continuous operation of the winch.

[0010] Furthermore, a lubrication oil passage is provided inside the left bearing housing of the input shaft, connecting the inside and outside of the bearing housing. A lubrication pipeline E is connected to the outside of the bearing housing via a connector. Lubricating oil enters the bearing housing through the lubrication oil passage within the bearing housing to forcibly lubricate bearing one. A first gap is provided between the input shaft and the bearing housing, and a second gap is provided between the input shaft and the bearing end cover. The lubricating oil for lubricating the bearings flows through gap one to the chain box and then to the bottom oil sump. The lubrication principle of bearings two, three, and four is the same as that of bearing one.

[0011] Technical effects of this utility model: Compared with the prior art, the DC winch thin oil lubrication system of this utility model uses thin oil lubrication for both the winch chain and the bearings in the bearing housing. The lubrication pipeline is branched into multiple paths, each reaching a preset position and lubricating the corresponding bearing or chain, eliminating the need for regular oiling and maintenance. It also solves the problem of bearing overheating at high speeds caused by grease lubrication. An electric gear oil pump is also provided as a backup. When the mechanical oil pump fails, the electric gear oil pump is activated to prevent the winch from being damaged due to lack of lubrication and to ensure the normal operation of the equipment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram illustrating the structural principle of the thin oil lubrication system for a DC winch of this utility model. Figure 2 This is a schematic diagram of the structure of the left bearing seat of the winch input shaft of this utility model; Figure 3 This is an enlarged schematic diagram of point I at the winch input shaft bearing seat of this utility model; Figure 4 This is an enlarged schematic diagram of point II at the winch input shaft bearing seat of this utility model.

[0013] In the diagram, 1. Suction filter; 2. Electric gear oil pump; 3. Mechanical oil pump; 4. Check valve; 5. Ball valve; 6. Discharge filter; 7. Pressure gauge; 8. Pressure transmitter; 9. Relief valve; 10. Lubricating oil line one; 11. Lubricating oil line two; 12. Lubricating oil line three; 13. Lubricating oil line four; 14. Lubricating oil circuit; 15. Gap one; 16. Gap two; 1-1. Suction filter one; 1-2. Suction filter two; 41. Check valve a; 42. Check valve b; 51. Ball valve one; 52. Ball valve two; 53. Ball valve three; 101. Lubricating line A; 102. Lubricating line B; 111. Lubricating line E; 112. Lubricating line F; 121. Lubricating line C; 122. Lubricating line D; 131. Lubricating line G; 132. Lubricating line H. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0015] Example 1: like Figure 1 As shown, this embodiment relates to a DC winch thin oil lubrication system, which includes an intake filter 1, an electric gear oil pump 2, a mechanical oil pump 3, a check valve 4, a ball valve 5, an exhaust filter 6, a pressure gauge 7, a pressure transmitter 8, an overflow valve 9, a lubricating oil pipeline 10 for the transmission chain between the input shaft and the intermediate shaft, a lubricating oil pipeline 11 for the input shaft bearing, a lubricating oil pipeline 12 for the transmission chain between the intermediate shaft and the drum shaft, a lubricating oil pipeline 13 for the intermediate shaft bearing housing, and connecting pipelines, tees, elbows, joints, oil nozzles, and other fittings.

[0016] The suction filter 1 includes a suction filter 1-1 for an electric oil pump and a suction filter 1-2 for a mechanical oil pump; the lubrication line 10 of the transmission chain between the input shaft and the intermediate shaft includes lubrication lines A101 and B102 for lubricating chains I and II respectively; the lubrication line 12 of the transmission chain between the intermediate shaft and the roller shaft includes lubrication lines C121 and D122 for lubricating chains III and IV respectively; the lubrication line 11 of the input shaft bearing includes lubrication lines E111 and F112 for lubricating bearings I and II respectively; the lubrication line 13 of the intermediate shaft bearing housing includes lubrication lines G131 and H132 for lubricating bearings III and IV respectively. Among them, chain I is a low-speed ratio transmission chain between the input shaft and the intermediate shaft, chain II is a high-speed ratio transmission chain between the input shaft and the intermediate shaft, chain III is a low-speed ratio transmission chain between the intermediate shaft and the roller shaft, chain IV is a high-speed ratio transmission chain between the intermediate shaft and the roller shaft, bearing one is the left bearing seat bearing of the input shaft, bearing two is the right bearing seat bearing of the input shaft, bearing three is the left bearing seat bearing of the intermediate shaft, and bearing four is the right bearing seat bearing of the intermediate shaft.

[0017] The mechanical oil pump 3 is located inside the winch base. It draws lubricating oil through the suction filter 1-2 and discharge filter 6, and delivers the lubricating oil through the lubricating oil pipeline to chains I, II, III, IV and bearings I, II, III, and IV, thereby achieving forced lubrication.

[0018] The working status of the lubrication system can be observed through pressure gauge 7, and the pressure of the lubrication system can be adjusted through overflow valve 9.

[0019] The electric gear oil pump 2 serves as a backup and is connected in parallel with the mechanical oil pump 3. The discharge lines of both pumps are equipped with check valves a41 and b42, respectively, ensuring unidirectional flow of lubricating oil. The electric gear oil pump 2 and mechanical oil pump 3 operate independently without affecting each other. When the mechanical oil pump 3 fails, the electric gear oil pump 2 is activated to prevent damage to the winch due to lack of lubrication.

[0020] Pressure transmitter 8 collects the lubrication system pressure, which is then processed by the drilling rig control system and transmitted to the driller's cabin. When the lubrication system pressure is low, the drilling rig control system alarms to alert the driller of a lubrication system malfunction. Ball valve 1 51 and ball valve 2 52 are connected in series before and after the discharge filter 6, respectively. A bypass branch is provided in parallel with the discharge filter 6, ball valve 1 51, and ball valve 2 52, and ball valve 3 53 is installed on the bypass branch. When the lubrication system is working normally, ball valve 1 51 and ball valve 2 52 are open, and ball valve 3 53 is closed, allowing lubricating oil to pass through the discharge filter 6. When the discharge filter 6 needs its filter element replaced or is damaged, ball valve 1 51 and ball valve 2 52 close, and ball valve 3 53 opens, allowing lubricating oil to pass through the bypass branch instead of the discharge filter 6. Even if the discharge filter 6 needs its filter element replaced or is damaged, the lubrication system can still operate to ensure the continuous operation of the winch.

[0021] Appendix Figure 2 and 3 As shown, a lubrication oil passage 14 is provided inside the left bearing housing of the input shaft. The lubrication oil passage 14 connects the inside and outside of the bearing housing. The outside of the bearing housing is connected to a lubrication pipeline E111 via a connector. Lubricating oil enters the bearing housing through the lubrication oil passage 14 to force lubricate bearing one. A gap 15 is provided between the input shaft and the bearing housing, and a gap 16 is provided between the input shaft and the bearing end cover. The lubricating oil for lubricating the bearings flows through gaps 15 and 16 to the chain box and then to the bottom oil sump. The lubrication principle of bearings two, three, and four is the same as that of bearing one. The original grease lubrication of bearings one, two, three, and four is changed to thin oil forced lubrication, eliminating the need for regular oiling and maintenance, and avoiding winch failures caused by improper maintenance such as missed maintenance due to human operation. Moreover, the lip seals on both sides of the bearings are eliminated, reducing maintenance points and simplifying maintenance. The selection of thin oil forced lubrication results in a high limiting speed for the bearings, solving the problem of bearing overheating at high speeds caused by grease lubrication.

[0022] The above-described specific embodiments are merely specific examples of this utility model. The patent protection scope of this utility model includes, but is not limited to, the above-described specific embodiments. Any appropriate changes or modifications made by a person skilled in the art that conform to the claims of this utility model should fall within the patent protection scope of this utility model.

Claims

1. A thin oil lubrication system for a DC winch, characterized in that, It includes a second suction filter, a mechanical oil pump, and a lubricating oil pipeline; one end of the second suction filter is connected to an oil storage device, and the other end is connected to the mechanical oil pump, the discharge pipeline of the mechanical oil pump is connected to the lubricating oil pipeline; a one-way valve b and a discharge filter are installed on the discharge pipeline of the mechanical oil pump; the lubricating oil pipeline includes lubricating oil pipeline one, lubricating oil pipeline two, lubricating oil pipeline three, and lubricating oil pipeline four, which are respectively used to lubricate the transmission chain between the input shaft and the intermediate shaft, the input shaft bearing, the transmission chain between the intermediate shaft and the roller shaft, and the intermediate shaft bearing seat.

2. The thin oil lubrication system for a DC winch according to claim 1, characterized in that, The discharge line of the mechanical oil pump is connected to lubricating oil line one near its end, and the end of the discharge line of the mechanical oil pump is connected to lubricating oil line three. Lubricating oil line two is connected to lubricating oil line one, and lubricating oil line four is connected to lubricating oil line three.

3. The DC winch thin oil lubrication system according to claim 2, characterized in that, The lubricating oil line one includes lubricating oil lines A and B for lubricating chains I and II respectively; the lubricating oil line three includes lubricating oil lines C and D for lubricating chains III and IV respectively; the lubricating oil line two includes lubricating oil lines E and F for lubricating bearings I and II respectively; the lubricating oil line four includes lubricating oil lines G and H for lubricating bearings III and IV respectively; chain I is a low-speed ratio transmission chain between the input shaft and the intermediate shaft, chain II is a high-speed ratio transmission chain between the input shaft and the intermediate shaft, chain III is a low-speed ratio transmission chain between the intermediate shaft and the roller shaft, chain IV is a high-speed ratio transmission chain between the intermediate shaft and the roller shaft, bearing one is the left bearing housing bearing of the input shaft, bearing two is the right bearing housing bearing of the input shaft, bearing three is the left bearing housing bearing of the intermediate shaft, and bearing four is the right bearing housing bearing of the intermediate shaft.

4. The thin oil lubrication system for a DC winch according to claim 1, characterized in that, A pressure gauge, a pressure transmitter, and a relief valve are installed on the discharge pipeline of the mechanical oil pump.

5. The thin oil lubrication system for a DC winch according to claim 1, characterized in that, The lubrication system also includes a suction filter and an electric gear oil pump. One end of the suction filter is connected to an oil storage device, and the other end is connected to the electric gear oil pump. A one-way valve a is installed on the discharge line of the electric gear oil pump. The electric gear oil pump and its discharge line are connected in parallel with the mechanical oil pump, and the parallel pipeline is connected to a ball valve.

6. The thin oil lubrication system for a DC winch according to claim 1, characterized in that, Ball valve 1 and ball valve 2 are connected in series in front of and behind the discharge filter, respectively. A bypass branch is provided in parallel with the discharge filter, ball valve 1 and ball valve 2, and ball valve 3 is provided on the bypass branch.

7. The DC winch thin oil lubrication system according to claim 3, characterized in that, The left bearing housing of the input shaft is provided with a lubrication oil passage, which connects the inside and outside of the bearing housing. The outside of the bearing housing is connected to the lubrication pipeline E through a connector. There is a gap one between the input shaft and the bearing housing, and a gap two between the input shaft and the bearing end cover. The lubricating oil for lubricating the bearing flows to the chain box through gap one.

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