Double-motor-driven large-torque gyrator for directional drilling machine

Abstract

The invention relates to the technical field of gyrators, and discloses a double-motor-driven large-torque gyrator for a directional drilling machine, a hydraulic motor is mounted on one side, far away from a gear box body, of a planetary speed reducing mechanism, and two braking devices are mounted above the other side of the gear box body; the cylindrical gear reducing mechanism is mounted in the gear box body; by arranging the first-stage planetary speed reduction mechanism and the cylindrical gear speed reduction mechanism for transmission, under the condition of the same transmission ratio, the size of a required reduction gearbox is smaller, the transmission stability is improved, and large-torque output is achieved; a single large-displacement hydraulic motor is driven into a double-hydraulic-motor driving structure, so that torque multiplication can be realized under the same condition; the motor displacement is reduced to half of the original displacement under the same torque, the mechanical efficiency of the whole machine is improved, and heating of a hydraulic system is reduced; a single braking device is changed into a double-braking device, the braking torque is improved, the double-braking device is arranged in the opposite direction of the double hydraulic motors, the braking torque is multiplied, the size is small, and the structural layout is reasonable and attractive.

Description

Technical Field

[0001] The invention relates to the technical field of rotators, in particular to a dual-motor driven high-torque rotator for a directional drilling rig. Background Art

[0002] Horizontal directional drilling rig is a kind of construction machinery for laying various underground public facilities (pipelines, cables, etc.) without excavating the ground surface. It is widely used in the laying of flexible pipelines for water supply, electricity, telecommunications, natural gas, coal gas, oil, etc. It is suitable for sandy soil, clay, etc., but not suitable for high groundwater level and pebble formations. It can be constructed in most non-hard rock areas in my country.

[0003] The common structures of high-torque rotators on the current market are: two-stage cylindrical gear transmission to achieve a large reduction ratio transmission; replacing a hydraulic motor with a larger displacement, and after reaching the maximum displacement limit of the motor, increasing the system pressure to achieve a high torque output; increasing the number and contact area of ​​the master and slave friction plates to increase the braking torque.

[0004] For the two-stage cylindrical gear transmission, the disadvantages of achieving high torque are: considering both strength and large reduction ratio, the gearbox width and overall volume are extremely large, which affects the overall structural layout of the drilling rig, and the transmission efficiency is low;

[0005] Disadvantages of replacing a larger displacement hydraulic motor and increasing the system pressure to achieve high torque output after reaching the upper limit of the motor's maximum displacement: a single large displacement motor is large in size, affecting the overall volume and layout of the rotator, and as the motor displacement increases, its mechanical efficiency and volumetric efficiency are lower, and as the system pressure increases, the leakage of the hydraulic pump and hydraulic motor increases, the heat generation is greater, and the overall efficiency is lower;

[0006] Increasing the number and contact area of ​​the master and slave friction plates to increase the braking torque has the following disadvantages: large size and difficult layout. In order to solve the above problems, a dual-motor driven high-torque rotator for a directional drilling rig is proposed. Summary of the invention

[0007] The object of the present invention is to provide a dual-motor driven high-torque rotator for a directional drilling rig to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above object, the present invention provides the following technical solution: a dual-motor driven high-torque rotator for a directional drilling rig, comprising:

[0009] Gear box;

[0010] Two planetary reduction mechanisms are installed on one side of the gear box body, a hydraulic motor is installed on the side of the planetary reduction mechanism away from the gear box body, and two brake devices are installed on the other side of the gear box body;

[0011] The cylindrical gear reduction mechanism is installed inside the gear box.

[0012] Preferably, the above-mentioned planetary reduction mechanism includes a sun gear, an inner ring gear, planetary gears, a planetary wheel carrier and a housing, the housing is installed on one side of the gear box, the sun gear is connected to the inside of the housing through a rotating shaft, the inner ring gear is installed inside the housing, the planetary wheel carrier is installed on the rotating shaft of the sun gear, and the planetary gears are connected to the planetary wheel carrier through a fixed shaft and are located inside the inner ring gear.

[0013] Preferably, the planetary gear is meshed and connected to the outer side of the sun gear, and the planetary gear is meshed and connected to the inner side of the inner gear ring.

[0014] Preferably, the cylindrical gear reduction mechanism comprises a main shaft, a first-stage passive gear and a first-stage driving gear, the main shaft is installed inside the gear box, the first-stage passive gear is fixedly sleeved on the outside of the main shaft, and the first-stage driving gear is fixedly sleeved on the outside of one end of the planetary wheel carrier.

[0015] Preferably, the first-stage driving gear is meshingly connected to the outer side of the first-stage passive gear.

[0016] Preferably, an oil distribution assembly is installed on one side of the gear housing below the planetary reduction mechanism.

[0017] Preferably, the output shaft of the hydraulic motor is connected to the rotating shaft of the sun gear.

[0018] Preferably, a hydraulic chuck is installed below the other side of the gear housing, and the hydraulic chuck is connected to one end of the main shaft.

[0019] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects:

[0020] 1. Compared with the traditional two-stage cylindrical gear transmission, the present invention sets a first-stage planetary reduction mechanism and a cylindrical gear reduction mechanism transmission. Under the same transmission ratio condition, the required reduction box volume is smaller, the transmission stability is improved, and a large torque output is achieved.

[0021] 2. Compared with the traditional method of replacing a hydraulic motor with a larger displacement, the present invention increases the system pressure after reaching the maximum displacement limit of the motor to achieve a large torque output. This solution can achieve torque doubling under the same conditions by driving a single large-displacement hydraulic motor into a dual-hydraulic motor drive structure; with the same torque, the motor displacement is reduced to half of the original, thereby improving the mechanical efficiency of the whole machine and reducing the heat generation of the hydraulic system.

[0022] 3. Compared with the traditional method, the present invention increases the number and contact area of ​​the master and slave friction plates to achieve an increase in braking torque. This solution increases the braking torque by changing the single braking device to a double braking device, which is arranged opposite to the double hydraulic motors to double the braking torque. It has a small size and a reasonable and beautiful structural layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a left-side structural schematic diagram of the present invention;

[0026] Figure 3 It is a schematic diagram of a partial cross-sectional structure of a gear box body of the present invention;

[0027] Figure 4 It is a schematic diagram of the partial cross-sectional structure of the shell of the present invention.

[0028] Explanation of the reference numerals: 1. gear box; 2. planetary reduction mechanism; 21. sun gear; 22. inner ring gear; 23. planetary gear; 24. planetary gear carrier; 25. housing; 3. cylindrical gear reduction mechanism; 31. main shaft; 32. first-stage passive gear; 33. first-stage driving gear; 4. hydraulic motor; 5. hydraulic chuck; 6. brake device; 7. oil distribution assembly. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0031] Example

[0032] See also Figure 1-4 The present invention provides a technical solution: a dual-motor driven high-torque rotator for a directional drilling rig, comprising a gear box 1; two planetary reduction mechanisms 2, the two planetary reduction mechanisms 2 are installed on one side of the gear box 1, a hydraulic motor 4 is installed on the side of the planetary reduction mechanism 2 away from the gear box 1, and two brake devices 6 are installed on the other side of the gear box 1; a cylindrical gear reduction mechanism 3, the cylindrical gear reduction mechanism 3 is installed inside the gear box 1, a hydraulic chuck 5 is installed below the other side of the gear box 1, the hydraulic chuck 5 is connected to one end of the main shaft 31, and an oil distribution component 7 is installed on one side of the gear box 1 below the planetary reduction mechanism 2; it is started by the hydraulic motor 4, the planetary reduction mechanism 2 is used to reduce speed and increase torque, and then the cylindrical gear reduction mechanism 3 is used to reduce speed and increase torque again, and then the torque is transmitted to the hydraulic chuck 5 through the main shaft 31, and the hydraulic chuck 5 clamps the drill pipe to output torque and speed;

[0033] By setting up a first-stage planetary reduction mechanism 2 and a cylindrical gear reduction mechanism 3 for transmission, under the condition of the same transmission ratio, the required reduction box volume is smaller, the transmission stability is improved, and a large torque output is achieved; by driving a single large-displacement motor into a dual-motor drive structure, under the same conditions, torque doubling can be achieved; with the same torque, the motor displacement is reduced to half of the original, the mechanical efficiency of the whole machine is improved, and the heat generation of the hydraulic system is reduced; by changing the single braking device into a dual braking device 6, the braking torque is increased, and it is arranged opposite to the dual hydraulic motors 4, so that the braking torque is doubled, the size is small, and the structural layout is reasonable and beautiful.

[0034] In order to complete a deceleration and torque increase, the planetary reduction mechanism 2 includes a sun gear 21, an inner ring gear 22, planetary gears 23, a planetary wheel carrier 24 and a housing 25. The housing 25 is installed on one side of the gear box body 1. The sun gear 21 is connected to the inside of the housing 25 through a rotating shaft, the inner ring gear 22 is installed inside the housing 25, the planetary wheel carrier 24 is installed on the rotating shaft of the sun gear 21, the planetary gears 23 are connected to the planetary wheel carrier 24 through a fixed shaft and are located inside the inner ring gear 22, the output shaft of the hydraulic motor 4 is connected to the rotating shaft of the sun gear 21, the planetary gears 23 are meshed and connected to the outside of the sun gear 21, and the planetary gears 23 are meshed and connected to the inside of the inner ring gear 22; the output shaft of the hydraulic motor 4 drives the sun gear 21 to rotate through the rotating shaft, the sun gear 21 drives the planetary gears 23 on the planetary wheel carrier 24 to rotate, the planetary gears 23 rotate inside the inner ring gear 22, so that the planetary wheel carrier 24 rotates, thereby achieving deceleration and torque increase through the planetary reduction mechanism 2.

[0035] In order to complete the secondary deceleration and torque increase, the cylindrical gear reduction mechanism 3 includes a main shaft 31, a primary passive gear 32 and a primary driving gear 33. The main shaft 31 is installed inside the gear box 1, the primary passive gear 32 is fixedly sleeved on the outer side of the main shaft 31, the primary driving gear 33 is fixedly sleeved on the outer side of one end of the planetary wheel carrier 24, and the primary driving gear 33 is meshed and connected to the outer side of the primary passive gear 32; the primary driving gear 33 is driven to rotate by one end of the planetary wheel carrier 24, the primary driving gear 33 drives the primary passive gear 32 to rotate, and the primary passive gear 32 drives the main shaft 31 to rotate, and the cylindrical gear reduction mechanism 3 is used to reduce the speed and increase the torque again.

[0036] The working principle or structural principle is that the output shaft of the hydraulic motor 4 drives the sun gear 21 to rotate through the rotating shaft, and the sun gear 21 drives the planetary gear 23 on the planetary gear carrier 24 to rotate. The planetary gear 23 rotates inside the inner gear ring 22, so that the planetary gear carrier 24 rotates, thereby achieving deceleration and torque increase through the planetary reduction mechanism 2. At this time, one end of the planetary gear carrier 24 drives the primary driving gear 33 to rotate, and the primary driving gear 33 drives the primary driven gear 32 to rotate. The primary driven gear 32 drives the main shaft 31 to rotate, and the torque is decelerated and increased again through the cylindrical gear reduction mechanism 3, and then transmitted to the hydraulic chuck 5 after being transmitted through the main shaft 31. The hydraulic chuck 5 clamps the drill pipe and outputs torque and speed;

[0037] During directional drilling, in order to overcome the counter-torque effect of the bottom hole motor and ensure that the main shaft 31 remains stationary, a braking device 6 is provided on the opposite side of the dual hydraulic motor 4. During directional drilling, the main shaft 31 is held tightly to prevent the main shaft 31 from reversing and ensure directional accuracy.

[0038] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

Claims

1. A dual-motor driven high torque gyrator for a directional drilling rig, characterized in that: include Gear box (1); Two planetary reduction mechanisms (2), the two planetary reduction mechanisms (2) being mounted on one side of a gear box (1), a hydraulic motor (4) being mounted on the side of the planetary reduction mechanism (2) away from the gear box (1), and two brake devices (6) being mounted above the other side of the gear box (1); A cylindrical gear reduction mechanism (3), wherein the cylindrical gear reduction mechanism (3) is installed inside the gear box body (1).

2. The dual-motor driven high torque rotator for a directional drilling rig according to claim 1, characterized in that: The planetary reduction mechanism (2) comprises a sun gear (21), an inner gear ring (22), a planetary gear (23), a planetary gear carrier (24) and a housing (25); the housing (25) is mounted on one side of the gear box (1); the sun gear (21) is connected to the inside of the housing (25) via a rotating shaft; the inner gear ring (22) is mounted inside the housing (25); the planetary gear carrier (24) is mounted on the rotating shaft of the sun gear (21); and the planetary gear (23) is connected to the planetary gear carrier (24) via a fixed shaft and is located inside the inner gear ring (22).

3. The dual-motor driven high torque rotator for directional drilling rig according to claim 2, characterized in that: The planetary gear (23) is meshedly connected to the outer side of the sun gear (21), and the planetary gear (23) is meshedly connected to the inner side of the inner gear ring (22).

4. The dual-motor driven high torque rotator for a directional drilling rig according to claim 2, characterized in that: The cylindrical gear reduction mechanism (3) comprises a main shaft (31), a first-stage passive gear (32) and a first-stage driving gear (33); the main shaft (31) is installed inside the gear box (1); the first-stage passive gear (32) is fixedly sleeved on the outside of the main shaft (31); and the first-stage driving gear (33) is fixedly sleeved on the outside of one end of the planetary wheel carrier (24).

5. The dual-motor driven high torque rotator for directional drilling rig according to claim 4, characterized in that: The first-stage driving gear (33) is meshingly connected to the outer side of the first-stage passive gear (32).

6. The dual-motor driven high torque rotator for directional drilling rig according to claim 1, characterized in that: An oil distribution assembly (7) is installed on one side of the gear box (1) below the planetary reduction mechanism (2).

7. The dual-motor driven high torque rotator for a directional drilling machine according to claim 1, characterized in that: The output shaft of the hydraulic motor (4) is connected to the rotating shaft of the sun gear (21).

8. The dual-motor driven high torque rotator for directional drilling rig according to claim 1, characterized in that: A hydraulic chuck (5) is installed below the other side of the gear box (1), and the hydraulic chuck (5) is connected to one end of the main shaft (31).

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