Ultra-deep hole time-sharing driving, self-adaptive floating sealing and lifting self-locking large-torque drilling machine

Abstract

The utility model relates to an ultra-deep hole time-sharing driving, self-adaptive floating sealing and lifting self-locking large-torque drilling machine, and belongs to the technical field of coal mine drilling machines. Comprising a rack, a sliding frame is arranged on the rack, an angle adjusting unit is arranged between the rack and the sliding frame, and a power output unit is arranged on the sliding frame; the power output unit comprises an output shaft and a power shell, and the output shaft penetrates through the power shell; an oil inlet sleeve assembly is arranged in an inner cavity of the power shell; the oil inlet sleeve assembly comprises an oil inlet sleeve, and the oil inlet sleeve is arranged on the output shaft through a rolling bearing; an oil inlet core is inserted into the oil inlet sleeve, and an outlet of the oil inlet core is communicated with the oil inlet cavity of the output shaft; two sealing grooves are symmetrically formed in the inner wall of the oil inlet sleeve, and sealing rings are clamped in the sealing grooves respectively. The oil inlet sleeve is arranged on the output shaft through the rolling bearing, and the sealing ring is mounted between the oil inlet sleeve and the output shaft, so that hydraulic oil leakage is avoided; the drilling rig carriage fixing reliability is improved, and the drilling rig carriage orientation angle is guaranteed.

Description

Technical Field

[0001] The utility model relates to an ultra-deep hole time-sharing drive, adaptive floating seal and lifting self-locking large torque drilling rig, belonging to the technical field of coal mine drilling rigs. Background Art

[0002] Drilling rigs are used underground in coal mines to extract gas. The larger the hole diameter, the better the gas seepage effect, so larger diameter drill rods are now increasingly used.

[0003] Gas geological drilling includes rock layers and coal layers. The rock layer is hard and dense, and when expanding holes with large diameters, especially ultra-deep holes, low speed and high torque are required for drilling; the coal layer is relatively soft, and high speed and low torque are required for drilling.

[0004] In the existing drilling rig power output unit, the oil inlet sleeve of the oil distribution mechanism is installed on the outside of the output shaft, and the two are kept concentric, with a labyrinth seal between them. When the drilling rig is expanding a deep hole with high torque, the power output unit is subjected to great force, so that when the output shaft rotates, the radial runout often exceeds the labyrinth seal gap between the output shaft and the oil inlet sleeve, and the inner side of the oil inlet sleeve contacts the output shaft and wears, and the labyrinth seal gap becomes larger, causing the seal to fail.

[0005] In addition, the directional drilling rig for coal mines uses the hydraulic cylinder piston rod to lift the drilling rig slide to achieve angle adjustment and orientation. At the same time, hydraulic locking and half joints are used to fix the slide. Due to leakage in the hydraulic system, it is difficult to maintain pressure, and the clamping force of the half joint is limited, and the slide cannot be reliably rigidly supported, making it difficult to fix the slide. During the expansion drilling process, when the high-torque power output unit is started and stopped, the torque on the slide changes dramatically, and the slide offset is particularly obvious.

[0006] Drilling rig manufacturers generally use a variable displacement pump + variable displacement motor. When the pump displacement is at its maximum, the motor displacement is adjusted to the minimum value V min When , the two motors have the highest speed and the output shaft has the highest speed. At this time, the output shaft cannot increase the speed any more, and the motor runs at the minimum displacement V min Moreover, when the motor is running at the minimum displacement, the pump cannot run at the maximum displacement. Therefore, the method of speed regulation using only pump and motor variables is not economical. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide an ultra-deep hole time-sharing drive, adaptive floating seal and lifting self-locking large torque drilling rig in view of the above-mentioned prior art. The oil inlet sleeve is arranged on the output shaft through a rolling bearing, and the oil inlet sleeve is not in direct contact with the output shaft. A sealing ring is installed between the oil inlet sleeve and the output shaft to avoid hydraulic oil leakage; the reliability of the drilling rig slide fixation is improved to ensure the directional angle of the drilling rig slide; speed change is achieved by switching the number of working motors to avoid the problem of reduced volumetric efficiency.

[0008] The technical solution adopted by the utility model to solve the above problems is: an ultra-deep hole time-sharing drive, adaptive floating seal and lifting self-locking large torque drilling rig, including a frame, a slide is provided on the frame, an angle adjustment unit is provided between the frame and the slide, and a power output unit is provided on the slide; the power output unit includes an output shaft and a power housing, the output shaft horizontally passes through the power housing, and the two are fixedly connected by a tapered roller bearing; the inner cavity of the power housing is provided with an oil inlet sleeve assembly;

[0009] The oil inlet sleeve assembly comprises an oil inlet sleeve, which is arranged on the output shaft through a rolling bearing; an oil inlet core hole is provided on the oil inlet sleeve, an oil inlet core is inserted into the oil inlet core hole, and the outlet of the oil inlet core is connected with the oil inlet cavity of the output shaft; two sealing grooves are symmetrically provided on the inner wall of the oil inlet sleeve, the two sealing grooves are arranged on both sides of the oil inlet core hole, sealing rings are respectively clamped in the sealing grooves, and the sealing rings are arranged between the oil inlet sleeve and the output shaft;

[0010] The angle adjustment unit includes a screw nut lifting mechanism, one end of the slide is hinged to the first hinge, and the other end of the slide is provided with a screw nut lifting mechanism, and the two are hinged by a second hinge; the bottom of the screw nut lifting mechanism is hinged to the third hinge, and the slide is arranged on the frame through the first hinge and the third hinge.

[0011] The inner diameter of the sealing ring matches the outer diameter of the output shaft.

[0012] The screw rod and nut lifting mechanism comprises a nut assembly, wherein a plurality of vertically arranged screw rods are respectively passed through the nut assembly, and the screw rods are respectively threadedly connected with the nut assembly.

[0013] The nut assembly comprises a nut shell, a plurality of nut storage cavities are arranged in the nut shell, nuts are respectively arranged in the nut storage cavities, and the nuts are screwed on the corresponding screw rods.

[0014] The screw rod and nut lifting mechanism can be a screw rod fixed, and the nut assembly can be rotated and lifted; or the screw rod and nut lifting mechanism can be a screw rod rotating, and the nut assembly can be lifted.

[0015] A fixing sleeve is respectively arranged at the bottom end of the screw rod, and the fixing sleeve is hinged to the third hinged member.

[0016] The power output unit is connected to two hydraulic motors: a first hydraulic motor and a second hydraulic motor. The first hydraulic motor is connected to the main oil pipe and the return oil pipe through a first hydraulic oil circuit, and the second hydraulic motor is connected to the main oil circuit and the return oil circuit through a second hydraulic oil circuit. A reversing valve is provided on the second hydraulic oil circuit, and the reversing valve controls the conduction or cutoff of the second hydraulic oil circuit.

[0017] The power housing is also provided with a cooling oil drain port and a cooling oil inlet port, and the cooling oil inlet port and the cooling oil drain port are respectively connected with the inner cavity of the power housing; the cooling oil inlet port is connected with the oil unloading port or the oil return port of the second hydraulic motor.

[0018] Compared with the prior art, the advantages of the utility model are: a super-deep hole time-sharing drive, adaptive floating seal and lifting self-locking high torque drilling rig, which realizes time-sharing variable speed drive chuck through the cooperation of two hydraulic motors and reversing valves, and adopts different speeds when cutting different geological conditions. Secondly, the oil inlet sleeve assembly is adaptively floating, the gap is constant, and the seal is reliable. Finally, the screw nut lifting mechanism adjusts the slide angle, can be mechanically self-locking, has good rigidity, ensures the slide orientation angle, and saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of an ultra-deep hole time-sharing drive, adaptive floating seal and lifting self-locking high torque drilling rig according to an embodiment of the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the power take-off unit;

[0021] Figure 3 for Figure 1 Schematic diagram of the center angle adjustment unit;

[0022] Figure 4 It is a schematic diagram of two hydraulic motors and a reversing valve;

[0023] Figure 5 It is the principle diagram of the oil circuit switching system of two hydraulic motors;

[0024] In the figure, 1 frame, 2 angle adjustment unit, 2.1 slide, 2.2 first hinge, 2.3 second hinge, 2.4 third hinge, 2.5 fixed sleeve, 2.6 nut housing, 2.7 screw, 3 power output unit, 3.1 power housing, 3.2 tapered roller bearing, 3.3 output shaft, 3.4 oil inlet sleeve, 3.5 oil inlet core, 3.6 rolling bearing, 3.7 labyrinth seal, 4 first hydraulic motor, 5 second hydraulic motor, 6 reversing valve, 7 second hydraulic oil circuit, 8 first hydraulic oil circuit, 9 main oil pipe, 10 return oil pipe. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] like Figure 1As shown, in this embodiment, an ultra-deep hole time-sharing drive, adaptive floating seal and lifting self-locking high torque drilling rig includes a frame 1, a slide 2.1 is provided on the frame 1, a power output unit 3 is provided on the slide 2.1, and an angle adjustment unit 2 is provided between the frame 1 and the slide 2.1. The angle adjustment unit 2 adjusts the angle of the slide 2.1, thereby adjusting the angle of the power output unit 3. Figure 3 As shown, the angle adjustment unit 2 includes a screw nut lifting mechanism, one end of the slide 2.1 is hinged to the first hinge 2.2; the other end of the slide 2.1 is provided with a vertically arranged screw nut lifting mechanism, and the slide 2.1 and the screw nut lifting mechanism are hinged through a second hinge 2.3. The bottom of the screw nut lifting mechanism is hinged to the third hinge 2.4, and the slide 2.1 is arranged on the frame 1 through the first hinge 2.2 and the third hinge 2.4.

[0027] The screw nut lifting mechanism comprises a nut assembly, wherein two vertically arranged screws 2.7 are respectively passed through the nut assembly, and the screws 2.7 are respectively threadedly connected to the nut assembly. A fixing sleeve 2.5 is respectively arranged at the bottom end of the screw 2.7, and the fixing sleeve 2.5 is hinged to the third hinge 2.4.

[0028] The nut assembly includes a nut housing 2.6, in which two nut storage cavities are arranged, and two nuts are arranged in the corresponding nut storage cavities. The nut housing 2.6 is fixedly connected to the nut through a bearing or a bearing sleeve or is directly sleeved on the nut. The nut is screwed on the corresponding screw rod 2.7. The second hinge 2.3 is arranged on the side of the nut housing 2.6, and the second hinge 2.3 is hinged to the slide 2.1.

[0029] The screw rod and nut lifting mechanism can be a screw rod fixed, the nut rotates and lifts; the screw rod and nut lifting mechanism can also be a screw rod rotating, the nut lifts, and can also drive the nut housing and one end of the slide to rise and fall synchronously, so that the slide angle changes, adjusts the angle of the power output unit, and ensures the positioning angle of the slide. The screw rod and the nut are mechanically self-locking to each other, which improves the reliability of slide positioning.

[0030] like Figure 2As shown, the power output unit 3 includes an output shaft 3.3 and a power housing 3.1. The output shaft 3.3 is horizontally passed through the power housing 3.1, and the two are fixedly connected by a tapered roller bearing 3.2. The inner cavity of the power housing 3.1 is provided with an oil inlet sleeve assembly, and the oil inlet sleeve assembly includes an oil inlet sleeve 3.4. The oil inlet sleeve 3.4 is arranged on the output shaft 3.3 through two symmetrically arranged rolling bearings 3.6. An oil inlet core hole is provided on the oil inlet sleeve 3.4, and an oil inlet core 3.5 is inserted into the oil inlet core hole, so that the outlet of the oil inlet core 3.5 is connected to the oil inlet cavity of the output shaft 3.3 to provide working oil for the chuck. Two sealing grooves are symmetrically provided on the inner wall of the oil inlet sleeve 3.4, and the two sealing grooves are arranged on both sides of the oil inlet core hole. Labyrinth seals 3.7 are respectively clamped in the sealing grooves, and the labyrinth seals 3.7 are arranged between the oil inlet sleeve 3.4 and the output shaft 3.3, so as to avoid leakage of the oil inlet core hole and ensure the pressure of the working oil of the chuck.

[0031] The inner diameter of the labyrinth seal ring 3.7 matches the outer diameter of the output shaft 3.3, thereby improving the sealing performance.

[0032] like Figure 4 , 5 As shown, the power output unit 3 is connected to two hydraulic motors: a first hydraulic motor 4 and a second hydraulic motor 5. The first hydraulic motor 4 is connected to the main oil pipe 9 and the return oil pipe 10 through the first hydraulic oil circuit 8, and the second hydraulic motor 5 is connected to the main oil pipe 9 and the return oil pipe 10 through the second hydraulic oil circuit 7. A reversing valve 6 is provided on the second hydraulic oil circuit 7, and the reversing valve 6 controls the conduction or cut-off of the second hydraulic oil circuit 7. When the reversing valve 6 is turned on, the second hydraulic oil circuit 7 is in a conducting state, and the second hydraulic motor 5 works; when the reversing valve 6 is turned off, the second hydraulic oil circuit 7 is in a cut-off state, and the second hydraulic motor 5 does not work. At this time, all the oil in the main oil pipe 9 passes through the first hydraulic motor 4. When the displacement of the first hydraulic motor 4 remains unchanged, the speed of the first hydraulic motor 4 doubles, thereby expanding the speed range. When the displacement of the hydraulic motor is constant, the displacement of one hydraulic motor is twice that of the two hydraulic motors, which avoids the situation where the displacement of the two hydraulic motors becomes smaller and the volumetric efficiency is reduced when the two hydraulic motors are running.

[0033] When cutting rock layers, the reversing valve is in the on state, the first hydraulic motor and the second hydraulic motor work at the same time, driving the chuck to drive the output shaft to rotate. At this time, the torque is large and the speed is low. When cutting coal seams, the reversing valve is in the off state, the first hydraulic motor drives the chuck to drive the output shaft to rotate. At this time, the speed increases and the torque decreases. The second hydraulic motor realizes the minimum displacement closed operation, and at the same time gives hydraulic oil to supplement the oil and serves as cooling oil.

[0034] The power housing 3.1 is also provided with a cooling oil drain port and a cooling oil inlet port, which are respectively connected to the inner cavity of the power housing. The cooling oil inlet port is connected to the oil discharge port or the oil return port of the second hydraulic motor, and the housing oil leakage or part of the return oil of the second hydraulic motor enters the power housing as cooling oil to cool it, and the cooled oil is discharged through the cooling oil drain port.

[0035] The oil inlet sleeve is set on the output shaft through a rolling bearing, and the oil inlet sleeve does not directly contact the output shaft. Since the oil inlet sleeve is fixed on the output shaft through a rolling bearing, the oil inlet sleeve will swing with the swing of the output shaft; even if the output shaft has a large swing amplitude, there will be no wear between the two. A sealing ring is installed between the oil inlet sleeve and the output shaft to avoid hydraulic oil leakage and help maintain the pressure of the chuck working oil. The hydraulic motor drain oil or part of the return oil is used as cooling oil to enter the power housing, and after absorbing heat, it is discharged through the cooling oil drain port. The oil inlet sleeve assembly of the power output unit is adaptively floating, with a constant gap and reliable sealing.

[0036] This application realizes time-sharing variable speed drive of the chuck by cooperating with two hydraulic motors and a reversing valve, and adopts different speeds when cutting different geological conditions. Secondly, the oil inlet sleeve assembly is adaptively floating, with constant clearance and reliable sealing. Finally, the screw nut lifting mechanism adjusts the slide angle, can be mechanically self-locked, has good rigidity, ensures the slide orientation angle, and saves time and effort.

[0037] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. An ultra-deep hole time-sharing drive, adaptive floating seal and lifting self-locking high torque drilling rig, characterized by: It comprises a frame, a slide is arranged on the frame, an angle adjustment unit is arranged between the frame and the slide, and a power output unit is arranged on the slide; the power output unit comprises an output shaft and a power housing, the output shaft horizontally passes through the power housing, and the two are fixedly connected by a tapered roller bearing; an oil inlet sleeve assembly is arranged in the inner cavity of the power housing; The oil inlet sleeve assembly comprises an oil inlet sleeve, which is arranged on the output shaft through a bearing; an oil inlet core hole is provided on the oil inlet sleeve, an oil inlet core is inserted into the oil inlet core hole, and the outlet of the oil inlet core is communicated with the oil inlet cavity of the output shaft; two sealing grooves are symmetrically provided on the inner wall of the oil inlet sleeve, the two sealing grooves are arranged on both sides of the oil inlet core hole, sealing rings are respectively clamped in the sealing grooves, and the sealing rings are arranged between the oil inlet sleeve and the output shaft; The angle adjustment unit includes a screw nut lifting mechanism, one end of the slide is hinged to the first hinge, and the other end of the slide is provided with a screw nut lifting mechanism, and the two are hinged by a second hinge; the bottom of the screw nut lifting mechanism is hinged to the third hinge, and the slide is arranged on the frame through the first hinge and the third hinge.

2. According to claim 1, an ultra-deep hole time-sharing drive, adaptive floating seal and lifting self-locking high torque drilling rig is characterized by: The inner diameter of the sealing ring matches the outer diameter of the output shaft.

3. According to claim 1, an ultra-deep hole time-sharing drive, adaptive floating seal and lifting self-locking high torque drilling rig is characterized by: The screw rod and nut lifting mechanism comprises a nut assembly, wherein a plurality of vertically arranged screw rods are respectively passed through the nut assembly, and the screw rods are respectively threadedly connected with the nut assembly.

4. The ultra-deep hole time-sharing drive, adaptive floating seal and lifting self-locking high torque drilling rig according to claim 3 is characterized by: The nut assembly comprises a nut housing, a plurality of nut storage cavities are arranged in the nut housing, nuts are respectively arranged in the nut storage cavities, and the nuts are screwed on corresponding screw rods.

5. According to claim 3, the ultra-deep hole time-sharing drive, adaptive floating seal and lifting self-locking high torque drilling rig is characterized by: The screw rod and nut lifting mechanism can be a screw rod fixed, and the nut assembly can be rotated and lifted; or the screw rod and nut lifting mechanism can be a screw rod rotating, and the nut assembly can be lifted.

6. The ultra-deep hole time-sharing drive, adaptive floating seal and lifting self-locking high torque drilling rig according to claim 3 is characterized by: A fixing sleeve is respectively arranged at the bottom end of the screw rod, and the fixing sleeve is hinged to the third hinged member.

7. The ultra-deep hole time-sharing drive, adaptive floating seal and lifting self-locking high torque drilling rig according to claim 1 is characterized by: The power output unit is connected to two hydraulic motors: a first hydraulic motor and a second hydraulic motor. The first hydraulic motor is connected to the main oil pipe and the return oil pipe through a first hydraulic oil circuit, and the second hydraulic motor is connected to the main oil circuit and the return oil circuit through a second hydraulic oil circuit. A reversing valve is provided on the second hydraulic oil circuit, and the reversing valve controls the conduction or cutoff of the second hydraulic oil circuit.

8. The ultra-deep hole time-sharing drive, adaptive floating seal and lifting self-locking high torque drilling rig according to claim 7, characterized in that: A cooling oil drain port and a cooling oil inlet are also provided, and the cooling oil inlet and the cooling oil drain port are respectively connected with the inner cavity of the power housing; the cooling oil inlet is connected with the oil unloading port or the oil return port of the second hydraulic motor.

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