Independent lubrication and cooling circulation system for drilling rig power head gearbox

Abstract

This invention belongs to the field of drilling rig power head cooling technology, and particularly to an independent lubrication and cooling circulation system for the gearbox of a drilling rig power head. The invention includes a hydraulic motor and a gearbox fixedly connected to one side of the hydraulic motor, a gear pump fixedly mounted on the side of the gearbox, and a water-cooled cooler outlet connected to the oil tank outlet via a cooling connection pipe to guide the filtered lubricating oil from the independent oil tank to a return flow distributor. This invention can discharge circulating lubricating oil into the gearbox to cool the moving parts such as gear bearings. Simultaneously, it can cool the heat-carrying circulating lubricating oil in the water-cooled cooler and filter any iron filings or other contaminants in the independent oil tank. This ensures the independence of other hydraulic systems in the equipment and solves a series of problems, such as poor cooling effect of traditional direct water cooling of the gearbox and moving parts, and the inability to effectively reduce the impact of worn parts on the overall hydraulic system.

Description

Technical Field

[0001] This utility model relates to the field of drilling rig power head cooling technology, specifically to an independent lubrication and cooling circulation system for the gearbox of a drilling rig power head. Background Technology

[0002] When a hydraulic core drilling rig is in operation, the hydraulic motor provides power to the power head. The temperature of the gears, bearings, spindle, and motor transmission connecting parts inside the power head gearbox (which are installed and penetrate the power head gearbox) will rise. A circulating cooling gear pump draws the heated circulating lubricating oil out of the gearbox, cools it down through an externally connected water cooler, and then circulates it back into the gearbox. In this way, the cooled circulating lubricating oil can continuously circulate to provide cooling for the internal and surrounding components of the gearbox, while also providing lubrication for the various components inside the gearbox that require lubrication.

[0003] In traditional hydraulic power heads, the temperature of moving parts such as gears and bearings inside the gearbox rises during operation. The common method is to pour cold water onto the outer casing, but this is not as effective as circulating lubricating oil cooled by water inside the power head gearbox. An independent oil tank can isolate iron filings and other dust generated by the moving parts inside the gearbox from the entire hydraulic system of the drilling rig, protecting the safety and stability of the motor, hydraulic operating system, and other components in the overall hydraulic system.

[0004] Therefore, we proposed an independent lubrication and cooling circulation system for the drilling rig power head gearbox to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an independent lubrication and cooling circulation system for the gearbox of a drilling rig power head. This solves the problem mentioned in the background art where the temperature of moving parts such as gears and bearings inside the gearbox of a traditional hydraulic power head rises during operation. The method of pouring cold water onto the outer casing is generally less effective than circulating lubricating oil cooled by water inside the gearbox. The independent oil tank can isolate iron filings and other dust generated by the moving parts inside the gearbox from the entire hydraulic system of the drilling rig, thus protecting the safety and stability of the motor, hydraulic operating system, and other components in the overall hydraulic system.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution: The drilling rig power head gearbox has an independent lubrication and cooling circulation system, including a hydraulic motor and a gearbox fixedly connected to one side of the hydraulic motor. The gear pump is fixed to the side of the gearbox. The bottom of the gearbox is connected to the oil drain chamber, and the gear pump and the oil drain chamber are connected by an oil drain pipe. The gear pump and the hydraulic motor are connected by a spline sleeve, bearings and gears. An independent oil tank is installed on the lower side of the hydraulic motor, and a water-cooled cooler is installed on one side of the independent oil tank. The independent oil tank is equipped with an oil tank outlet and an oil tank inlet at the top; the outlet of the water-cooled cooler is connected to the oil tank outlet via a cooling connection pipe to guide the cooled lubricating oil into the independent oil tank; the oil tank inlet is connected to the return flow divider via an oil guide pipe to guide the filtered lubricating oil in the independent oil tank to the return flow divider.

[0007] Furthermore, the surface of the oil drain tank is provided with two sets of spaced-apart oil drain ports located on both sides of the bottom of the oil drain tank.

[0008] Furthermore, one end of the oil drain pipe is detachably connected to two sets of oil drain ports.

[0009] Furthermore, the surface of the gearbox is provided with multiple sets of oil inlet ports.

[0010] Furthermore, a reflux distributor is fixedly installed at the front end of the oil drain tank, and the multiple outlets of the reflux distributor are connected to the oil inlet interface through multiple oil component pipes.

[0011] Compared with the prior art, this utility model provides an independent lubrication and cooling circulation system for the power head gearbox of a drilling rig, which has the following beneficial effects: This invention allows circulating lubricating oil to be discharged into the gearbox to cool and lubricate moving parts such as gear bearings. At the same time, the circulating lubricating oil carrying heat can be cooled in a water-cooled cooler, and any iron filings or powder that may be present can be filtered in an independent oil tank. This ensures the independence of other hydraulic systems in the equipment and solves the problems of poor cooling effect and inability to effectively reduce the impact of worn parts on the overall hydraulic system caused by traditional water spraying directly onto the gearbox and moving parts. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a connection diagram of the oil drain pipe of this utility model; Figure 3 This is a connection diagram of the oil drain pipe and the oil drain interface of this utility model; Figure 4 This is an exploded view of the drilling rig power head of this utility model.

[0013] In the diagram: 1. Hydraulic motor; 2. Gearbox; 3. Gear pump; 4. Return distributor; 5. Oil drain tank; 6. Oil inlet; 7. Oil drain port; 8. Oil drain pipe section; 9. Independent oil tank; 10. Oil tank outlet; 11. Oil tank inlet; 12. Water cooler; 13. Oil drain pipe; 14. Oil guide pipe; 15. Oil distribution pipe; 16. Cooling connection pipe. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0015] like Figure 1-4 As shown, an embodiment of this utility model proposes an independent lubrication and cooling circulation system for the drilling rig power head gearbox, including a hydraulic motor 1 and a gearbox 2 fixedly connected to one side of the hydraulic motor 1, wherein a gear pump 3 is fixedly mounted on the side of the gearbox 2, such as... Figure 4 As shown in section A, from left to right, are a gear pump, end cover, O-ring, bearing, spline sleeve, pinion, bearing, spline sleeve, connecting sleeve, bearing, and hydraulic motor 1. The output end of the hydraulic motor 1 meshes with the spline sleeve to transmit torque, while the spline sleeve is fixed to the pinion. At the same time, the other end of the pinion is fixed to the spline sleeve on the left side, and the spline sleeve on the left side meshes with the shaft of the gear pump 3. Therefore, through the drive of the hydraulic motor 1, power can be transmitted to the gear pump 3 through the spline sleeve and the pinion. An oil drain chamber 5 is fixed at the bottom of the gearbox 2, and the inner cavity of the gearbox 2 is connected to the inner cavity of the oil drain chamber 5. After the gears and other components in the gearbox 2 come into contact with the lubricating oil, they fall into the oil drain chamber 5 by gravity and wait to be discharged. In order to facilitate the discharge of lubricating oil in the oil drain chamber 5, two sets of oil drain ports 7 are set on both sides near the bottom of the front end of the oil drain chamber 5. An independent oil tank 9 and a water-cooled cooler 12 are connected and installed on the lower side of the hydraulic motor 1. The independent oil tank 9 is used to store a certain amount of circulating lubricating oil. At the same time, the independent oil tank 9 is equipped with a filter structure that can filter materials such as iron filings, reducing the possible impact of impurities such as iron filings and powders generated by moving parts on the large hydraulic system. Meanwhile, the water-cooled cooler 12 is used to cool down the circulating lubricating oil that carries heat, so that the circulating lubricating oil can be circulated, cooled and lubricated.

[0016] To cool the circulating lubricating oil carrying heat, an oil drain pipe 8 is connected between the oil drain port 7 and the gear pump 3. The bottom of the oil drain pipe 8 is connected to the water-cooled cooler 12 via an oil drain pipe 13. The oil drain pipe 8 draws the hot circulating lubricating oil through the oil drain pipe 13 into the water-cooled cooler 12 for cooling. Then, another outlet of the water-cooled cooler 12 is connected to an independent oil tank 9 via a cooling connection pipe 16. The top of the independent oil tank 9 is equipped with a cooling connection... The oil tank outlet 10 is connected to the cooling connection pipe 16, which allows the cooled and unfiltered circulating lubricating oil to be discharged from the oil tank outlet 10 into the independent oil tank 9. A structure for filtering materials such as iron filings is provided between the oil tank inlet 11 and the oil tank outlet 10 in the independent oil tank 9, which isolates the wear debris of the gearbox from the main hydraulic system. After filtration, the circulating lubricating oil enters the oil tank inlet 11 at the top of the independent oil tank 9, and is discharged from the oil tank inlet 11 into the return flow divider 4 through the oil guide pipe 14. A return flow divider 4 is fixed on the side of the oil drain tank 5. Since the return flow divider 4 has multiple outlets, and each outlet can be connected to the oil distribution pipe 15, and the other end of the oil distribution pipe 15 is connected to multiple oil inlet ports 6 on the surface of the gearbox 2, the circulating lubricating oil can be diverted from the return flow divider 4 to various areas inside the gearbox 2, so that the circulating lubricating oil can cool the gears and other structures in various areas inside the gearbox 2. This can realize independent lubrication circulation and cooling of the drilling rig power head. Since there are two sets of oil drain ports 7, the bottom end of the oil drain pipe 8 can be connected to the two sets of oil drain ports 7 individually. In this way, when the drill head is drilling horizontally or downward, it can be connected to the oil drain ports 7 at different positions to achieve better circulation of the circulating lubricating oil. The dual oil drain port 7 design ensures the stability of oil discharge under the tilting condition of the drilling rig.

[0017] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An independent lubrication and cooling circulation system for a drilling rig power head gearbox, comprising a hydraulic motor (1) and a gearbox (2) fixedly connected to one side of the hydraulic motor (1), characterized in that, The gear pump (3) is fixed on the side of the gearbox (2). The bottom of the gearbox (2) is connected to the oil drain chamber (5), and the gear pump (3) and the oil drain chamber (5) are connected by an oil drain pipe (8). The gear pump (3) and the hydraulic motor (1) are connected by a spline sleeve, bearings and gears. An independent oil tank (9) is installed on the lower side of the hydraulic motor (1), and a water-cooled cooler (12) is installed on one side of the independent oil tank (9). The top of the independent oil tank (9) is provided with an oil tank outlet (10) and an oil tank inlet (11); the outlet of the water-cooled cooler (12) is connected to the oil tank outlet (10) through a cooling connecting pipe (16) to introduce the cooled lubricating oil into the independent oil tank (9); the oil tank inlet (11) is connected to the return flow divider (4) through an oil guide pipe (14) to export the filtered lubricating oil in the independent oil tank (9) to the return flow divider (4).

2. The independent lubrication and cooling circulation system for the drilling rig power head gearbox according to claim 1, characterized in that: The surface of the oil drain chamber (5) is provided with two sets of oil drain ports (7) that are spaced apart and located on both sides of the bottom of the oil drain chamber (5).

3. The rig head gear box independent lubrication cooling circulation system of claim 1, wherein: One end of the oil drain pipe (8) is detachably connected to two sets of oil drain ports (7).

4. The drilling rig headgear gear box independent lubrication cooling circulation system of claim 1, wherein: The surface of the gearbox (2) is provided with multiple sets of oil inlet ports (6).

5. The independent lubrication and cooling circulation system for the drilling rig power head gearbox according to claim 1, characterized in that: The front end of the drain tank (5) is fixed with a reflux diverter (4), and the multiple outlets of the reflux diverter (4) are connected to the inlet port (6) through multiple oil component pipes (15).

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