High-temperature annular speed reducer for petroleum underground electric tool

Abstract

The utility model relates to the technical field of speed reducers, in particular to a high-temperature annular speed reducer for a petroleum underground electric tool, which comprises a gear ring, an output flange, a planet wheel, a first roller pin, a gasket, a first sun wheel, a retainer needle roller bearing, a first planet carrier, a hexagon socket cap screw, a positioning pin, a second planet carrier, a second sun wheel and a second roller pin. Eleven-stage planetary speed reduction is adopted, a structure that a first sun gear inputs, a gear ring is fixed and a second planet carrier outputs is adopted, meanwhile, the second planet carrier and a second sun gear are connected in an interference fit mode, the structure of the annular hollow planetary speed reducer is improved, the length is only 156.1, and the overall transmission efficiency of the speed reducer resistant to the high temperature of 300 DEG C reaches 55%; the rated output torque reaches 350 Nm, meanwhile, operation is flexible, no dead point exists on the circumference, and production, manufacturing and assembling are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of reducers, in particular to a high-temperature annular reducer for petroleum underground electric tools. Background Art

[0002] High-temperature annular reducers for oil well power tools are mainly used in oil tools. Oil tools often require low speed and high torque output, and sometimes they also require hollowness and high temperature resistance. High requirements are placed on the inner and outer diameters of the reducer. At the same time, it is also necessary to ensure that the reducer can continuously output large torque smoothly and stably, operate flexibly, and continuously output large torque.

[0003] Prior art CN2206870Y is a ring-shaped reducer, whose technical features are: a circular ring cam with spiral tooth grooves is fixed on the input shaft of the reducer, a stator with inner spherical spiral tooth grooves is fixed on the inner side of the shell, the output shaft is fixed to the star wheel frame, several star wheels are evenly assembled on the star wheel frame, rollers are assembled on the star wheel teeth, the star wheels are assembled between the stator and the circular ring cam, and the rollers on the star wheel teeth are respectively engaged with the spiral tooth grooves of the cam and the spiral tooth grooves of the stator. Its advantages are: it can achieve multi-point engagement, reduce the load of the force-bearing components, thereby improving the mechanical efficiency, the single-stage transmission ratio can reach 50, high efficiency, long life, small size, and light weight.

[0004] However, the above-mentioned annular reducers are difficult to stably meet the output requirements of petroleum tools under the conditions of the same size, the same level of reduction ratio, output torque and transmission efficiency. Utility Model Content

[0005] The utility model aims to provide a high-temperature annular reducer for oil well downhole electric tools, aiming to solve the problem that the existing annular reducer is difficult to meet the requirements of smooth and stable operation, flexible operation and continuous output of large torque.

[0006] To achieve the above-mentioned purpose, the utility model provides a high-temperature annular reducer for an oil well power tool, comprising a gear ring, an output flange, a planetary gear, a first needle roller, a washer, a first sun gear, a retainer needle roller bearing, a first planet carrier, a hexagon socket cylindrical head screw, a locating pin, a second planet carrier, a second sun gear and a second needle roller; the second needle roller is detachably connected to the first planet carrier and is located in the first planet carrier, the first needle roller is arranged on one side of the gear ring, the output flange is detachably connected to the gear ring and is located near the first needle roller, the locating pin is detachably connected to the first planet carrier and passes through the output flange, the hexagon socket cylindrical head screw is threadedly connected to the first planet carrier and passes through the locating pin, the second sun gear is arranged on the side of the first planet carrier away from the output flange, the second planet carrier is arranged on the side of the second sun gear, the planetary gear is rotatably connected to the first planet carrier and is located near the first needle roller, the retainer needle roller bearing is arranged on the side of the planetary gear close to the first needle roller, the washer is arranged on the side of the planetary gear, and the first sun gear is arranged on the side of the second planet carrier.

[0007] Wherein, the high-temperature annular reducer for oil well downhole electric tools further comprises a wire retaining ring, and the wire retaining ring is arranged on the side of the first sun gear away from the second planet carrier.

[0008] Wherein, the first planet carrier and the second planet carrier both have a plurality of through holes.

[0009] Wherein, the first planet carrier and the second planet carrier are each provided with a plurality of countersunk holes, and the countersunk holes are located at one side of the through hole.

[0010] The utility model discloses a high-temperature annular reducer for oil well downhole electric tools. When the high-temperature annular reducer is installed, the second needle roller is pressed into the first planet carrier, the first needle roller is adhered to the corresponding groove of the gear ring with high-temperature grease, and then the output flange is inserted, the first planet carrier is fixedly connected to the output flange with the positioning pin, and then the positioning pin is fixed with the hexagon socket head screw. The second planet carrier, the second sun gear, the washer, the planet gear and the second needle roller are 10 groups in total, and each group is a level. The second sun gear is pressed into the second planet carrier, the second needle roller is pressed into the second planet carrier, the retaining needle roller bearing is placed inside each of the planet gears, and then placed together on the second needle roller corresponding to the first planet carrier, and the second planet carrier is rotated to make the meshing with the gear ring smooth; the washer is covered above the second planet gear, and the second planet carrier of the upper level is , placed on the washer of the next level, so that it can mesh smoothly with the planetary gear of the previous level; put the planetary gear with the retaining needle bearing placed inside into the corresponding second needle roller of the second planetary carrier, rotate the second planetary carrier, so that it can mesh smoothly with the ring gear, and repeat the above operation until the last level of the second planetary carrier is installed, the last level is placed in the first sun gear, and then the washer is covered, and then the corresponding slot of the motor is installed, the wire retaining ring is installed, and the bolts connected to the motor are tightened. The high-temperature annular reducer adopts eleven-stage planetary reduction, each stage includes the second planetary carrier, the second sun gear, the washer, the planetary gear and the second needle roller, which is the structure of the first sun gear input, the ring gear is fixed, and the second planetary carrier outputs. At the same time, the second planetary carrier and the second sun gear are connected by interference fit, which is used to connect the second planetary carrier and the washer of the next level to reduce axial friction. Screw connection is adopted between the first planet carrier and the output flange, which facilitates the installation of the retaining needle bearing and is easy to disassemble. By improving the structure of the annular hollow planetary reducer, the outer diameter is 128 and the length is only 156.1, and the overall transmission efficiency of the high-temperature 300°C reducer reaches 55%, and the rated output torque reaches 350Nm. At the same time, it is flexible in operation, has no dead points on the circumference, and is easy to produce, manufacture and assemble, thereby solving the problem that the existing annular reducer is difficult to simultaneously meet the requirements of smooth and stable operation and flexible operation and continuous output of large torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] 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 are briefly introduced below.

[0012] Figure 1 It is a longitudinal sectional view of a high-temperature annular reducer for an oil well downhole electric tool according to the utility model.

[0013] Figure 2 The utility model is a structural schematic diagram of a first planetary frame of a high-temperature annular reducer for an oil well electric tool.

[0014] Figure 3 The utility model is a structural schematic diagram of a high-temperature annular reducer for an oil well downhole electric tool, with the output flange, the gear ring and the first planet carrier removed.

[0015] In the figure: 1-gear ring, 2-output flange, 3-planetary gear, 4-first needle roller, 5-washer, 6-first sun gear, 7-cage needle roller bearing, 8-wire retaining ring, 9-first planet carrier, 10-hexagon socket head screw, 11-locating pin, 12-second planet carrier, 13-second sun gear, 15-second needle roller, 16-through hole, 17-countersunk hole. DETAILED DESCRIPTION

[0016] See also Figure 1-Figure 3 , including a ring gear 1, an output flange 2, a planetary gear 3, a first needle roller 4, a washer 5, a first sun gear 6, a retaining needle bearing 7, a first planetary carrier 9, a hexagon socket head screw 10, a locating pin 11, a second planetary carrier 12, a second sun gear 13 and a second needle roller 15; also including a wire retaining ring 8, the first planetary carrier 9 and the second planetary carrier 12 each have 12 through holes 16, the first planetary carrier 9 and the second planetary carrier 12 each have 12 countersunk holes 17, the above-mentioned solution solves the problem that the existing annular reducer is difficult to simultaneously meet the requirements of smooth and stable operation and flexible operation to continuously output large torque. It can be understood that the above-mentioned solution can be used in the scenario where the annular reducer is used.

[0017] According to the present specific embodiment, the second needle roller 15 is detachably connected to the first planet carrier 9 and is located in the first planet carrier 9. The first needle roller 4 is arranged on one side of the gear ring 1. The output flange 2 is detachably connected to the gear ring 1 and is located near the first needle roller 4. The locating pin 11 is detachably connected to the first planet carrier 9 and passes through the output flange 2. The hexagon socket head screw 10 is threadedly connected to the first planet carrier 9 and passes through the locating pin 11. The second sun gear 13 is arranged on the side of the first planet carrier 9 away from the output flange 2. The second planet carrier 12 is arranged on the side of the second sun gear 13. The planetary gear 3 is rotatably connected to the first planet carrier 9 and is located near the first needle roller 4. The retaining needle roller bearing 7 is arranged on the side of the planetary gear 3 near the first needle roller 4. The washer 5 is arranged on the side of the planetary gear 3. The first sun gear 6 is arranged on the side of the second planet carrier 12. When the high-temperature annular reducer is installed, the second needle roller 1 5 is pressed into the first planet carrier 9, the first needle roller 4 is adhered to the corresponding groove of the gear ring 1 with high-temperature grease, and then inserted into the output flange 2, the first planet carrier 9 is fixedly connected to the output flange 2 with the positioning pin 11, and the positioning pin 11 is fixed with the hexagon socket head screw 10. The second planet carrier 12, the second sun gear 13, the washer 5, the planetary gear 3 and the second needle roller 15 are 10 groups in total, each group is a level, the second sun gear 13 is pressed into the second planet carrier 12, and the second needle roller 15 is pressed into the second planet carrier 12; the retaining needle roller bearing 7 is placed inside each of the planetary gears 3, and then placed together on the corresponding part of the first planet carrier 9, the second planet carrier 12 is rotated to make it mesh smoothly with the gear ring 1; the washer 5 is covered on the second planetary gear 3, and the second planet carrier 12 of the upper level is placed on the washer 5 of the lower level to make it mesh smoothly with the planetary gear 3 of the upper level;Place the planetary wheel 3 with the retaining needle bearing 7 inside onto the second needle roller 15 corresponding to the second planetary carrier 12, rotate the second planetary carrier 12 to make it mesh smoothly with the gear ring 1, and repeat the above operation until the last stage of the second planetary carrier 12 is installed. Put the first sun gear in the last stage, then cover the washer 5, and then install the motor into the slot corresponding to the second sun gear 13, install the wire retaining ring 8, and tighten the bolts connected to the motor. The high-temperature annular reducer adopts eleven-stage planetary reduction, each stage includes the second planetary carrier 12, the second sun gear 13, the washer 5, the planetary wheel 3 and the second needle roller 15, which is the first sun gear 6 input, the gear ring 1 is fixed, the second planet carrier 12 outputs the structure, and the second planet carrier 12 and the second sun gear 13 are connected by interference fit, and screws are used between the first planet carrier 9 and the output flange 2, which facilitates the installation of the retaining needle bearing 7 and is easy to disassemble. By improving the structure of the annular hollow planetary reducer, the outer diameter is 128 and the length is only 156.1, and the overall transmission efficiency of the high-temperature 300℃ reducer reaches 55%, and the rated output torque reaches 350Nm. At the same time, it is flexible in operation, has no dead point on the circumference, and is easy to produce and assemble, solving the problem that the existing annular reducer is difficult to meet the requirements of smoothness, stability, and flexible operation and continuous output of large torque. ;

[0018] The wire retaining ring 8 is arranged on the side of the first sun gear 6 away from the second planet carrier 12, and the wire retaining ring 8 is used to limit axial movement.

[0019] Secondly, the through hole 16 is used to rotatably support the planetary gear 3 and serves as the rotation center of the planetary gear 3.

[0020] At the same time, the countersunk hole 17 is located on one side of the through hole 16. The movement form of the high-temperature annular reducer is the same as that of a general planetary reducer. The ring gear 1 and the output flange 2 are fixed, the first sun gear 6 is rotated, and the planetary gear 3 is driven, thereby driving the second planetary carrier 12. The second planetary carrier 12 rotates synchronously with the second sun gear 13 of the next stage to complete the cycle of each stage.

[0021] The above disclosure is only a preferred embodiment of a high-temperature annular reducer for an oil well downhole power tool of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A high-temperature annular reducer for petroleum downhole electric tools, characterized in that: It includes a gear ring, an output flange, a planetary gear, a first needle roller, a washer, a first sun gear, a retainer needle roller bearing, a first planet carrier, a hexagon socket head screw, a locating pin, a second planet carrier, a second sun gear and a second needle roller; The second needle roller is detachably connected to the first planet carrier and is located in the first planet carrier. The first needle roller is arranged on one side of the ring gear. The output flange is detachably connected to the ring gear and is located close to the first needle roller. The locating pin is detachably connected to the first planet carrier and passes through the output flange. The hexagon socket cylindrical head screw is threadedly connected to the first planet carrier and passes through the locating pin. The second sun gear is arranged on the side of the first planet carrier away from the output flange. The second planet carrier is arranged on the side of the second sun gear. The planetary gear is rotatably connected to the first planet carrier and is located close to the first needle roller. The retaining rack needle roller bearing is arranged on the side of the planetary gear close to the first needle roller. The washer is arranged on the side of the planetary gear, and the first sun gear is arranged on the side of the second planet carrier.

2. A high temperature annular reducer for a petroleum downhole electric tool as claimed in claim 1, characterized in that: The high-temperature annular reducer for an oil well downhole electric tool further comprises a wire retaining ring, and the wire retaining ring is arranged on a side of the first sun gear away from the second planet carrier.

3. A high temperature annular reducer for a downhole petroleum electric tool as claimed in claim 2, characterized in that: The first planet carrier and the second planet carrier are each provided with a plurality of through holes.

4. A high temperature annular reducer for a petroleum downhole electric tool as claimed in claim 3, characterized in that: The first planet carrier and the second planet carrier are each provided with a plurality of countersunk holes, and the countersunk holes are located at one side of the through hole.

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