Novel transmission device and working method

Abstract

The invention provides a novel transmission device and a working method. The novel transmission device comprises a support, a bearing seal, a sealing gland, a transmission box, a key and a center shaft. The support is fixed on an upper flange of the transmission case and is connected with the rotating speed torque sensor through the coupler and the locking screw, the rotating speed torque sensor is in key connection with the center shaft, the center shaft is in threaded connection with the flange, the center shaft and the flange are fixed together through the transmission key, and the transmission case is in threaded connection with the pressing threaded sleeve. The outer ring of the pull-up bearing II is in contact with the lower end face of the compression screw sleeve, the inner ring of the pull-up bearing II is in contact with the step of the central shaft, the outer ring of the press-down bearing II is in contact with the step of the transmission case, and the inner ring of the press-down bearing II is in contact with the step of the central shaft. The two-way load bearing device, the torque sensor and the rotating speed sensor are arranged in an integrated mode, the structure is compact, the bearing capacity and the two-way bearing stability are high, and the device can be suitable for the fields of under-pressure operation well drilling, industrial robot joints, aerospace and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of drilling equipment, and particularly relates to a novel transmission device and a working method. Background Art

[0002] With the continuous deepening of oil and gas field development, conventional operations use high-density well killing, which not only has high costs but may also block the oil-water channels, affecting oil production and water injection efficiency; underbalanced drilling operations are carried out under the conditions of not killing the well and not discharging the blowout. This new type of drilling operation process can reduce the disturbance to the formation, protect and maintain the original productivity of the reservoir, and effectively avoid the pollution of the oil layer; during the underbalanced drilling process, according to the drilling depth, when starting to drill, the resultant force of the drill string is upward, and the drill string transmission device needs to bear the upward thrust. As the drilling depth increases, the resultant force of the drill string becomes downward, and the drill string transmission device needs to bear the downward pressure. Therefore, it is necessary to develop a novel transmission device that can bear axial bidirectional loads, that is, axial thrust and axial pressure in the opposite direction.

[0003] The main functions of the existing transmission devices are to transmit torque, achieve speed change and power split, and there are obvious shortcomings when facing axial loads. When the traditional transmission structure bears axial heavy loads, problems such as increased wear of components and loosening of connections are likely to occur, resulting in reduced transmission efficiency and even equipment failures. Against this technical background, it is of great significance to develop a novel transmission device that can bear axial bidirectional loads. Summary of the Invention

[0004] The purpose of the present invention is to solve the defects existing in the above-mentioned prior art and provide a novel transmission device and a working method.

[0005] The present invention adopts the following technical solutions: A novel transmission device, characterized in that it is composed of a bracket, a bearing seal, a seal gland, a transmission box, a key, a central shaft, a flange, a transmission key, a bearing, a compression sleeve, a rotational speed and torque sensor, a coupling and a locking screw; The bracket is fixed on the upper flange of the transmission box and connected to the rotational speed and torque sensor together with the coupling and the locking screw. The rotational speed and torque sensor is connected to the central shaft by a key. The central shaft and the flange are connected by threads and fixed together by a transmission key. The transmission box and the compression sleeve are connected by threads. The outer ring of the upper pull bearing II contacts the lower end face of the compression sleeve, and the inner ring of the upper pull bearing II contacts the step of the central shaft. The outer ring of the lower pressure bearing II contacts the step of the transmission box, and the inner ring of the lower pressure bearing II contacts the step of the central shaft. The transmission box is fixed on the fixed flange seat of the transmission device by bolts, and a bearing beam is installed below the fixed flange seat of the transmission device.

[0006] Under the action of two layers of bearing II, the central shaft can bear both pressure and tension while rotating. Bearing III and bearing I align and correct the central shaft, and bearing seal I and bearing seal II seal the four layers of bearings up and down to form a lubrication cavity.

[0007] Furthermore, the motor is installed on the upper end face of the bracket through bolts. The motor drives the rotation speed torque sensor I, the central shaft, and the flange together, and outputs torque and rotation speed signals at the same time.

[0008] Furthermore, the end of the central shaft has an external thread, and the end of the flange has an internal thread. The flange and the central shaft are thread-connected to form a thread pair.

[0009] Furthermore, bolt I is used to fix the transmission key on the end face of the central shaft, and an adjusting gasket is provided between the central shaft and the flange.

[0010] Furthermore, the upper end of the transmission box has an internal thread, and the pressing sleeve has an external thread. The thread connection between the transmission box and the pressing sleeve forms a thread pair A.

[0011] Furthermore, the grease cup is located on the end face of the central shaft close to the flange, and the grease cup is used for filling grease.

[0012] Furthermore, the bearing seal is installed between the end cover and the inner ring of bearing III, and bearing seal I is installed between the gland and the rotation speed torque sensor, so that bearing seal I and bearing seal II seal the four layers of bearings up and down to form a lubrication cavity.

[0013] The present invention also provides a working method for a new type of transmission device, including: When the resultant force of the operating conditions is downward, the pressure of the central shaft is transmitted to the lower pressing bearing II through the step of the central shaft, and then transmitted to the step of the transmission box. It is transmitted to the fixed flange seat of the transmission device through the transmission box, and the pressure is transmitted to the bearing beam.

[0014] When the resultant force of the operating conditions is upward, the tensile force of the central shaft is transmitted to the upper pulling bearing II through the step of the central shaft, and then transmitted to the pressing sleeve. It is transmitted to the transmission box through the thread pair A, and the transmission box transmits the tensile force to the fixed flange seat of the transmission device, thereby transmitting the tensile force to the bearing beam. Under the action of the lower pressing bearing II, the upper pulling bearing II, the pressing sleeve and the transmission box, the central shaft can bear both pressure and tension while rotating.

[0015] Furthermore, it also includes that the inner ring of bearing III contacts the step of the central shaft, the outer ring of bearing III contacts the step of the transmission box, and the outer ring of bearing III is pressed against the end of the transmission box by bolts through the end cover. Bearing I is installed between the upper end of the transmission box and the gland to realize the alignment and straightening of the central shaft by bearing III and bearing I.

[0016] Further, it also includes that the greased grease enters the central shaft lubrication channel. A part of the grease enters Bearing III, and Bearing III is fully lubricated. Another part enters Channel T2, and through Channel T2, the lower pressing Bearing II is fully lubricated. Through the ball clearance of the lower pressing Bearing II, the grease enters Channel T3, then enters the ball clearance of the upper pulling Bearing II, and finally enters Bearing I through Channel T4.

[0017] It also includes the application of a new type of transmission device in downhole pressure operation or industrial robot joints.

[0018] The beneficial effects of the present invention: The transmission device of the present invention can bear axial bidirectional loads according to the needs of the operation conditions. When the resultant force direction of the operation conditions is downward, the transmission device bears the pressure load. On the contrary, when the resultant force direction of the operation conditions is upward, the transmission device bears the tensile load. The transmission device has high load-bearing capacity and bidirectional load-bearing stability. The transmission device adopts an integrated layout of a bidirectional load device, torque, and rotational speed sensors, with a compact structure, and can be applied to fields such as pressure operation drilling, industrial robot joints, aerospace, etc. Description of the Drawings

[0019] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of flange installation; Figure 3 It is a schematic diagram of bidirectional load transmission; Figure 4 It is a schematic diagram of the lubrication channel.

[0020] In the figure: 1 - Bracket, 2 - Bearing Seal I, 3 - Seal gland, 4 - Transmission box, 5 - Key, 6 - Bearing Seal II, 7 - Central shaft, 8 - Flange, 9 - Transmission key, 10 - Grease cup, 11 - Bearing III, 12 - Bearing II, 13 - Bearing I, 14 - Compression sleeve, 15 - Rotational speed and torque sensor, 16 - Coupling, 17 - Locking screw, 18 - Motor; 101 - Adjusting gasket, 102 - Bolt I; 201 - Transmission device fixed flange seat, 202 - Load-bearing beam, 203 - End cover, 204 - Bolt II, 205 Lower pressing Bearing II, 206 Upper pulling Bearing II, 207 Gland. Detailed Implementation Modes

[0021] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be described clearly and completely below. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] As Figures 1 - 4 shown, the new transmission device is composed of a bracket 1, a bearing seal I 2, a seal gland 3, a transmission case 4, a key 5, a bearing seal II 6, a central shaft 7, a flange 8, a transmission key 9, an oil cup 10, a bearing III 11, a bearing II 12, a bearing I 13, a compression sleeve 14, a rotational speed and torque sensor 15, a coupling 16, a locking screw 17 and a motor 18.

[0023] The bracket 1 is fixed to the upper flange of the transmission case 4, and the motor 18 is installed on the upper end face of the bracket 1 with bolts. The motor 18 is connected to the rotational speed and torque sensor 15 with the coupling 16 and the locking screw 17, and the rotational speed and torque sensor 15 is connected to the central shaft 7 with the key 5 to transmit torque.

[0024] As Figure 2 shown, the end of the central shaft 7 is designed with an external thread, and the end of the flange 8 is designed with an internal thread. The flange 8 can be screwed into the central shaft 7 along the thread pair; the end faces of the central shaft 7 and the flange 8 are designed with key grooves, and the central shaft 7 and the flange 8 are fixed together with the transmission key 9, and the transmission key 9 is fixed to the end face of the central shaft 7 with a bolt I 102; an adjusting gasket 101 is provided between the central shaft 7 and the flange 8 to ensure that the key groove surfaces of the installed transmission key 9 are flush; when the motor 18 rotates, it will drive the rotational speed and torque sensor 15, the central shaft 7 and the flange 8 to rotate together, transmit torque, and output torque and rotational speed signals at the same time.

[0025] As Figure 3 shown, the upper end of the transmission case 4 is designed with an internal thread, and the compression sleeve 14 is designed with an external thread. The internal and external threads of the transmission case 4 and the compression sleeve 14 form a thread pair A. The outer ring of the upper pull bearing II 206 of the two-layer bearing contacts the lower end face of the compression sleeve 14, and the inner ring of the upper pull bearing II 206 contacts the step B of the central shaft 7; the outer ring of the lower pressure bearing II 205 of the two-layer bearing contacts the step D of the transmission case 4, and the inner ring of the lower pressure bearing II 205 contacts the step C of the central shaft 7.

[0026] When the resultant force of the operating conditions is downward, that is, the central shaft 7 is subjected to a downward pressure. The pressure of the central shaft is transmitted to the lower pressure bearing II 205 through the step C, and then transmitted to the step D of the transmission case 4, and through the transmission case 4 to the fixed flange seat 201 of the transmission device, thereby transmitting the pressure to the bearing beam 202. The transmission case 4 is fixed to the fixed flange seat 201 of the transmission device by bolts. The bearing beam 202 is installed below the fixed flange seat 201 of the transmission device. This bearing beam is the installation foundation of the transmission device. The output shaft or flange of the transmission device is connected to related equipment to realize the installation of the transmission device.

[0027] When the resultant force of the operating conditions is upward, that is, the central shaft 7 is subjected to an upward pulling force. The pulling force of the central shaft 7 is transmitted to the upper pulling bearing II 206 through the step B, and then transmitted to the compression sleeve 14, and through the thread pair A to the transmission case 4. The transmission case 4 transmits the pulling force to the fixed flange seat 201 of the transmission device, thereby transmitting the pulling force to the bearing beam 202. That is, under the combined action of the lower pressure bearing II 205, the upper pulling bearing II 206, the compression sleeve 14, and the transmission case 4, the central shaft 7 can bear both pressure and pulling force while rotating.

[0028] The inner ring of the bearing III 11 contacts the step F of the central shaft 7, and the outer ring of the bearing III 11 contacts the step E of the transmission case 4. The outer ring of the bearing III 11 is pressed against the end of the transmission case 4 by the bolt 204 through the end cover 203. The bearing I 13 is installed between the upper end of the transmission case 4 and the gland 207; the bearing III 11 and the bearing I 13 align and straighten the central shaft 7.

[0029] The bearing seal II 6 is installed between the end cover 203 and the inner ring of the bearing III 11 to seal the lower channel of the lubrication cavity; the bearing seal I 2 is installed between the gland 207 and the rotational speed and torque sensor 15 to seal and lubricate the upper channel of the cavity; that is, the bearing seal I 2 and the bearing seal II 6 seal the upper and lower parts of the four-layer bearing (bearing I 13, upper pulling bearing II 206, lower pressure bearing II 205, bearing III 11) to form a lubrication cavity.

[0030] As Figure 4 shown, the oil cup 10 is located at the end face of the central shaft 7 close to the flange 8. A general grease filling gun is connected to the oil cup 10. The filled grease enters the lubrication channel T1 of the central shaft 7. Part of the grease enters the bearing III 11, and the bearing III 11 is fully lubricated. Another part enters the channel T2, and through the channel T2, the lower pressure bearing II 205 is fully lubricated. Through the ball clearance of the lower pressure bearing II 205, the grease enters the T3 channel, then enters the ball clearance of the upper pulling bearing II 206, and finally enters the bearing I 13 through the channel T4, that is, the four-layer bearing is fully lubricated.

[0031] The working method of this new type of transmission device: In industrial practice, in working conditions such as under-pressure operations and industrial robot joints, it is required that the transmission device has the axial load-bearing capacity while transmitting torque. In the under-pressure operation working condition, the working condition of the transmission device is complex. As the well pressure and drilling depth change, the transmission device may change from being subjected to axial tension to axial compression; for industrial robot joints, as the spatial attitude changes, the joint transmission device alternates between tension and compression.

[0032] As described above, in combination with Figure 3 , when the resultant force of the working condition is downward, that is, the central shaft 7 is subjected to a downward pressure, the pressure of the central shaft is transmitted to the lower pressing bearing II 205 through the step C, and then transmitted to the step D of the transmission box 4, and transmitted to the transmission device fixed flange seat 201 through the transmission box 4, so as to transmit the pressure to the bearing beam 202.

[0033] When the resultant force of the working condition is upward, that is, the central shaft 7 is subjected to an upward tension, the tension of the central shaft is transmitted to the upper pulling bearing II 206 through the step B, and then transmitted to the pressing sleeve 14, and transmitted to the transmission box 4 through the thread pair A. The transmission box 4 transmits the tension to the transmission device fixed flange seat 201, so as to transmit the tension to the bearing beam 202.

[0034] In this way, that is, under the combined action of the lower pressing bearing II 205, the upper pulling bearing II 206, the pressing sleeve 14 and the transmission box 4 of the central shaft 7, the central shaft 7 can bear both pressure and tension while rotating.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A new transmission device, characterized in that: It consists of a bracket, a bearing seal, a sealing cover, a transmission box, a key, a center shaft, a flange, a transmission key, a bearing, a locking screw sleeve, a speed torque sensor, a coupling and a locking screw; the bracket is fixed to the upper flange of the transmission box, and is connected to the speed torque sensor with a coupling and a locking screw, the speed torque sensor is connected to the center shaft with a key, the center shaft and the flange are connected by threads, and the center shaft and the flange are fixed together with a transmission key, the transmission box and the locking screw sleeve are connected by threads, the outer ring of the upper pull bearing II contacts with the lower end face of the locking screw sleeve, the inner ring of the upper pull bearing II contacts with the step of the center shaft, the outer ring of the lower pressure bearing II contacts with the step of the transmission box, the inner ring of the lower pressure bearing II contacts with the step of the center shaft, the transmission box is fixed to the fixed flange seat of the transmission device by bolts, and a load-bearing beam is installed at the lower part of the fixed flange seat of the transmission device.

2. The device according to claim 1, characterized in that The motor is installed on the upper end surface of the bracket by bolts. The motor will rotate with the speed torque sensor I, the center shaft and the flange, and output torque and speed signals at the same time.

3. The device according to claim 1, characterized in that The end of the center shaft has an external thread, the end of the flange has an internal thread, and the flange and the center shaft are threadedly connected to form a thread pair.

4. The device according to claim 1, characterized in that The transmission key is fixed to the end face of the center shaft by bolt Ⅰ, and an adjusting gasket is arranged between the center shaft and the flange.

5. The device according to claim 1, characterized in that The upper end of the transmission box is provided with an internal thread, the compression screw sleeve is provided with an external thread, and the threaded connection between the transmission box and the compression screw sleeve forms a thread pair A.

6. The device according to claim 1, characterized in that The oil cup is located at the end face of the center shaft and the flange, and the oil cup is used to add grease.

7. The device according to claim 1, characterized in that The bearing seal is installed between the end cover and the inner ring of the bearing III, and the bearing seal I is installed between the pressure cover and the speed torque sensor, so that the bearing seal I and the bearing seal II seal the four-layer bearing up and down to form a lubrication cavity.

8. A working method of a novel transmission device, characterized in that: include: When the combined force of the working condition is downward, the pressure of the center shaft is transmitted to the downward pressure bearing II through the step of the center shaft, and then transmitted to the step of the transmission box, and then transmitted to the fixed flange seat of the transmission device through the transmission box, and the pressure is transmitted to the load-bearing beam; When the working force is upward, the center shaft tension is transmitted to the upper pull bearing II through the step of the center shaft, and then to the compression screw sleeve, and then to the transmission box through the thread pair A. The transmission box transmits the tension to the fixed flange seat of the transmission device, thereby transmitting the tension to the load-bearing beam; Under the action of the downward pressure bearing II, the upward pull bearing II, the compression screw sleeve and the transmission box, the central shaft is subjected to both pressure and tension while rotating.

9. The method according to claim 8, characterized in that It also includes the inner ring of bearing III contacting with the step of the center shaft, the outer ring of bearing III contacting with the step of the transmission box, the outer ring of bearing III is pressed tightly to the end of the transmission box through the end cover with bolts, and bearing I is installed between the upper end of the transmission box and the pressure cover to realize the center alignment of bearing III and bearing I with respect to the center shaft.

10. The method according to claim 8, characterized in that It also includes the added grease entering the lubrication channel of the central shaft, a part of the grease enters the bearing III, the bearing III is fully lubricated, and the other part enters the channel T2, so that the downward pressure bearing II is fully lubricated through the channel T2, and the grease enters the T3 channel through the ball clearance of the downward pressure bearing II, and then enters the ball clearance of the upward pull bearing II, and finally enters the bearing I through the channel T4.

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