CN2906131Y

CN2906131Y - Ground driving gear of direct-drive type screw pump without retarder

Info

Publication number: CN2906131Y
Application number: CNU200620118648XU
Authority: CN
Inventors: 徐国民; 魏显峰; 鲁明延; 杜瑞
Original assignee: Daqing Oilfield Co Ltd
Current assignee: Daqing Oilfield Co Ltd
Priority date: 2006-06-13
Filing date: 2006-06-13
Publication date: 2007-05-30
Anticipated expiration: 2016-06-13

Abstract

Disclosed is a surface driving device without the reducer for direct drive screw pump in order to solve the problems in the surface drive device for the screw pump wells currently available that the rotational speeds can not be adjusted freely, the power loss is large with expensive maintenance costs and danger potentials. The utility model is characterized in that a four-way flange (1) at the well head is positioned in order with a bearing seat (3), a bearing cover (4), a bracket (5), and an electrical motor (6). Both the bearing seat (3) and the bearing cover (4) are embedded with a ball bearing (7) inside. The pumping rod (2) is fixed on a drive shaft (8) which goes through the bearing seat (3) and the bearing cover (4) and matches with the ball bearing (7). A thrust bearing (9) is arranged inside the bearing seat (3) in the vertical direction. The drive shaft (8), connected with a motor shaft (10), is clipped in the vertical direction on the thrust bearing (9). The utility model is characterized in that the rotation speed of the screw pump can be adjusted freely, the power loss is small with low maintenance costs as well as security and reliability.

Description

Decelerator-free directly-driven screw pump surface drive

Technical field:

The utility model relates to a kind of screw pump ground lift device, especially the decelerator-free directly-driven screw pump surface drive that uses in the oil recovery field, oil field.

Background technique:

In oil recovery field, oil field, screw pump ground lift device often adopts in some oil wells, and the screw bolt well surface drive all is made up of parts such as well head, power motor, retarders at present.There is following shortcoming in this device: the one, adjust the screw pump rotating speed by changing motor pulley, and the rotating speed of screw pump can not arbitrarily be adjusted; The 2nd, because the use of belt and retarder has increased by about 20% power loss, power loss is bigger; The 3rd, the maintenance cost of retarder is higher in daily production management; The 4th, when the screw pump rotating speed is higher, there is potential safety hazard.

The model utility content:

For the rotating speed that overcomes existing screw bolt well surface drive screw pump can not arbitrarily be adjusted, power loss is big, maintenance cost is higher and have the deficiency of potential safety hazard, the utility model provides a kind of decelerator-free directly-driven screw pump surface drive, the direct drive screw pump of the power motor sucker rod running of this decelerator-free directly-driven screw pump surface drive, the rotating speed with screw pump is adjusted arbitrarily, power loss is little, maintenance cost low and safe and reliable characteristics.

The technical solution of the utility model is: this decelerator-free directly-driven screw pump surface drive comprises well head four-way flange and sucker rod, well head four-way flange top is fixed with bearing support, bearing cap, support and motor successively, all be inlaid with ball bearing in bearing support and the bearing cap, sucker rod be fixed on pass bearing support and bearing cap and with transmission shaft that ball bearing cooperates on, bearing support is built-in with axial thrust bearing, transmission shaft is stuck on the axial thrust bearing, and transmission shaft links to each other with motor shaft.

Above-mentioned motor is a permanent magnet D.C. torque motor, transmission shaft and motor shaft are hollow shaft, sucker rod passes transmission shaft and motor shaft, the upper and lower end of corresponding motor shaft all is fixed with moment of torsion and transmits clamp on the sucker rod, two moments of torsion transmit clamp and link to each other with the two ends of motor shaft respectively, be fixed with the axial carrying clamp on the sucker rod, axial carrying clamp seat links to each other in the upper end of transmission shaft and with transmission shaft.

The utlity model has following beneficial effect: owing to take such scheme, retarder, belt in the existing drive unit have been cancelled, transmission part reduces, and can realize the continuous adjustment of output speed by special purpose driver, with former driving mode specific energy consumption is reduced about 30%, maintenance cost reduces, simultaneously high-speed rotary motor is changed into the low speed rotation motor, improved safety coefficient, avoided the generation of casualty accident, power loss is little, and is safe and reliable.

Description of drawings:

Accompanying drawing 1 is a structural representation of the present utility model.

1-well head four-way flange among the figure, the 2-sucker rod, the 3-bearing support, the 4-bearing cap, the 5-support, the 6-motor, the 7-ball bearing, the 8-transmission shaft, the 9-axial thrust bearing, the 10-motor shaft, the 11-moment of torsion transmits clamp, 12-axial carrying clamp.

Embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

By shown in Figure 1, this decelerator-free directly-driven screw pump surface drive comprises well head four-way flange 1 and sucker rod 2, well head four-way flange 1 top is fixed with bearing support 3 successively, bearing cap 4, support 5 and motor 6, motor 6 is a permanent magnet D.C. torque motor, all be inlaid with ball bearing 7 in bearing support 3 and the bearing cap 4, sucker rod 2 be fixed on pass bearing support 3 and bearing cap 4 and with transmission shaft 8 that ball bearing 7 cooperates on, bearing support 3 is built-in with axial thrust bearing 9, transmission shaft 8 is stuck on the axial thrust bearing 9, transmission shaft 8 and motor shaft 10 are hollow shaft, sucker rod 2 passes transmission shaft 8 and motor shaft 10, the upper and lower end of corresponding motor shaft 10 all is fixed with moment of torsion and transmits clamp 11 on the sucker rod 2, two moments of torsion transmit clamp 11 and link to each other with the two ends of motor shaft 10 respectively, be fixed with axial carrying clamp 12 on the

sucker rod

2,12 of axial carrying clamps link to each other in the upper end of transmission shaft 8 and with transmission shaft 8.

During actual the use, motor 6 rotations are transmitted clamp 11 transmitting torques by moment of torsion and are made 2 rotations of screw pump sucker rod.The thrust load that the down-hole acts on the sucker rod 2 acts on the axial thrust bearing 9 by the axial carrying clamp, and 7 centralizing functions of ball bearing guarantee transmission shaft 8 strict centering in rotation process.Because motor shaft 10 and transmission shaft 8 all design hollow shaft, can propose sucker rod when the screw pump well-flushing, guarantee well washing effect.Motor 6 utilizes permanent magnet D.C. torque motor, can realize the continuous adjustment of output speed by special purpose driver.The utility model has been cancelled retarder, the belt in the existing drive unit, transmission part reduces, with former driving mode specific energy consumption is reduced about 30%, maintenance cost reduces, simultaneously high-speed rotary motor is changed into the low speed rotation motor, improved safety coefficient, avoided the generation of casualty accident, power loss is little, and is safe and reliable.

Claims

1, a kind of decelerator-free directly-driven screw pump surface drive, comprise well head four-way flange (1) and sucker rod (2), it is characterized in that: well head four-way flange (1) top is fixed with bearing support (3) successively, bearing cap (4), support (5) and motor (6), all be inlaid with ball bearing (7) in bearing support (3) and the bearing cap (4), sucker rod (2) be fixed on pass bearing support (3) and bearing cap (4) and with transmission shaft (8) that ball bearing (7) cooperates on, bearing support (3) is built-in with axial thrust bearing (9), transmission shaft (8) is stuck on the axial thrust bearing (9), and transmission shaft (8) links to each other with motor shaft (10).

2, decelerator-free directly-driven screw pump surface drive according to claim 1, it is characterized in that: motor (6) is a permanent magnet D.C. torque motor, transmission shaft (8) and motor shaft (10) are hollow shaft, sucker rod (2) passes transmission shaft (8) and motor shaft (10), the upper and lower end that sucker rod (2) is gone up corresponding motor shaft (10) all is fixed with moment of torsion transmission clamp (11), two moments of torsion transmit clamp (11) and link to each other with the two ends of motor shaft (10) respectively, be fixed with axial carrying clamp (12) on the sucker rod (2), axial carrying clamp (12) seat links to each other in the upper end of transmission shaft (8) and with transmission shaft (8).