CN2802121Y - Ground driving device of multifunction combined screw pump - Google Patents

Abstract

The utility model relates to a ground driving device of a multifunctional combined screw pump, which comprises a bracket; a motor and a reduction box are arranged on the bracket, wherein a hollow sealing shaft is arranged in the reduction box; the middle part of the sealing shaft is sheathed with a main shaft; the upper part of the sealing shaft is sheathed with a mechanical seal; the upper part of the bracket is provided with a sealing device; two sealing clamping heads are arranged in the sealing device; annular grooves and sealing rubber rings are arranged on the sealing clamping heads; half circular arc-shaped slots are respectively arranged along the radial direction of the inner end faces of the sealing clamping heads. The utility model is characterized in that the surfaces of the half circular arc-shaped slots are machined with clamping teeth; the inner end faces of the sealing clamping heads are provided with horizontal grooves; combined rubber sealing rings are arranged in the horizontal groove and an annular groove adjacent to the horizontal groove; the upper part of the main shaft is sheathed with a mechanical seal seat; the upper part of the mechanical seal seat is provided with a mechanical seal outer sleeve; the mechanical seal is positioned in the mechanical seal outer sleeve; an O-shaped sealing ring is arranged between the upper end face of the mechanical seal seat and the mechanical seal outer sleeve. The utility model has the advantages of long sealing life, good sealing effect and convenient maintenance; when crude oil leaks, the utility model can prevent the crude oil from entering a gear box.

Description

Multifunction combined screw pump surface drive

Technical field

The utility model is particularly related to a kind of multifunction combined screw pump surface drive.

Background technique

The screw pump surface drive is mainly used in to the work of oil recovery subsurface progressive cavity power is provided.By packing_seal, its sealing means is motive sealing between original screw pump surface drive and the polished rod.There is following drawback in this motive sealing: 1, lack sealing life, packing was generally 2～4 months working life; 2, increased the main shaft Operating torque; 3, sealing effect is poor, and mechanical seal is leaked easily.After technological improvement, the main shaft lower end installs mechanical seal additional, though sealing effect strengthens, maintenance is inconvenient, dismantle complete machine and could keep in repair, and directly enters speed reducer behind the crude oil leakage.

Summary of the invention

The purpose of this utility model is to solve the problems referred to above that prior art exists, and provides a kind of sealing life long, good sealing effect, and is easy to maintenance, enters the multifunction combined screw pump surface drive of gear-box in the time of can preventing crude oil leakage.

The utility model is achieved in that it has a support, on support, be provided with motor, be provided with speed reducer in the support upper end, in speed reducer, be provided with reduction gears mechanism, motor output shaft is connected with reduction gears mechanism by driving mechanism, in speed reducer, be fastened with stepped hollow seal axle, be set with main shaft at the seal shaft middle part, main shaft is connected with reduction gears mechanism, be set with mechanical seal on seal shaft top, be provided with seal arrangement on support top, be provided with two sealing dops in the said seal arrangement, on the cylindrical wall of sealing dop, be provided with circular groove, in circular groove, be provided with O-ring seal, radially be respectively equipped with half-arc groove at sealing dop interior edge face, its special way is: in the half-arc groove surface Machining card tooth is arranged, be provided with horizontal groove at sealing dop interior edge face, horizontal groove communicates with adjacent circular groove, in horizontal groove and in the circular groove that is adjacent, be provided with the combination rubber seal, be set with mechanical sealing base on main shaft top, be provided with the mechanical seal overcoat on mechanical sealing base top, said mechanical seal is positioned at the mechanical seal overcoat, is provided with the O RunddichtringO between mechanical sealing base upper-end surface and mechanical seal overcoat.

The utility model has the advantages that:, can work to hold polished rod and sealed well mouth pressure simultaneously owing on the sealing dop, be provided with the combination rubber seal; Mechanical sealing base directly is sleeved on the main shaft, and between mechanical sealing base upper-end surface and mechanical seal overcoat, be provided with the O RunddichtringO, can simplify sealing configuration, make overall structure compact more, reduce the complete machine height, reduce cost, install and remove convenient, be convenient to maintenance, enter gear-box in the time of can preventing crude oil leakage.

Description of drawings

Fig. 1 is an assembling schematic representation of the present utility model;

Fig. 2 is the structural representation of seal arrangement in the utility model;

Fig. 3 is the A-A sectional view of Fig. 2.

Among the figure: 1-support, 2-lower flange, 3-oil outlet, 4-motor, 5-seals transverse tube, 6-screw plug, 7-connecting sleeve, 8-lower end cap, the 9-speed reducer, 10-seal shaft, 11-main shaft, 12-radial bearing, the 13-thrust roller bearing, 14-driven gear, 15-end cap, 16-gear box cover, the 17-bearing, 18-bearing (ball) cover, 19-mechanical sealing base, 20-mechanical seal overcoat, the 21-polished rod, 22-polished rod seal packing, 23-polished rod slips, 24-nut, 25-mechanical seal, 26-O RunddichtringO, 27-bearing, 28-cantilevered axle bearing, 29-bearing, 30-brake strap, the 31-ratchet, 32-ratchet, 33-rotating shaft, the 34-wheel hub, 35-driving gear shaft, 36-end cap, the 37-nut, 38-lock bolt, 39-locking nut, 40-seals dop, 41-driving gear, 42-circular groove, the 43-circular groove, 44-half-arc groove, 45-horizontal groove, the 46-O-ring seal, 47-makes up rubber seal, 48-card tooth.

Embodiment

As shown in the figure, the utility model has a support 1, said support 1 is a tubular, be provided with lower flange 2 in support 1 bottom, be provided with oil outlet 3 at support 1 middle part, on support 1, be provided with motor 4, by screw thread speed reducer 9 is installed in support 1 upper end, be provided with seal arrangement on support 1 top, said seal arrangement is by sealing transverse tube 5, by being threaded in the screw plug 6 at sealing transverse tube 5 two ends, be installed in the locking nut 39 that seals in transverse tube 5 two-port by screw thread, be located at two sealing dops 40 in the sealing transverse tube 5, constitute by the lock bolt 38 that is threaded on the locking nut 39 and front end is connected with sealing dop 40, sealing transverse tube 5 middle parts are provided with suitable for reading and end opening, on the cylindrical wall of sealing dop 40, be respectively equipped with circular groove 42 and 43, radially be respectively equipped with half-arc groove 44 at two sealing dop 40 interior edge faces, in half-arc groove 44 surface Machining card tooth 48 is arranged, be provided with horizontal groove 45 at sealing dop 40 interior edge faces, horizontal groove 45 communicates with adjacent circular groove 43, in circular groove 42 in the outer part, be provided with O-ring seal 46, in horizontal groove 45 and with circular groove 43 that horizontal groove 45 communicates in be provided with and make up rubber seal 47, be provided with lower end cap 8 in speed reducer 9 bottoms, at sealing transverse tube 5 connecting sleeves 7 that are welded with suitable for reading, in speed reducer 9, be provided with stepped hollow seal axle 10, said seal shaft 10 bottoms are locked on the speed reducer 9 by nut 37, peg graft and seal ring are set therebetween in connecting sleeve 7 tops and seal shaft 10 bottoms, be set with main shaft 11 at seal shaft 10 middle parts, be set with mechanical seal 25 and spacing by nut 24 on seal shaft 10 tops, between main shaft 11 bottoms and speed reducer 9, be provided with radial bearing 12 and thrust roller bearing 13 from the bottom to top successively, be provided with driven gear 14 in thrust roller bearing 13 upper ends, said driven gear 14 and main shaft 11 are connected by key, be connected with cantilevered axle bearing 28 in speed reducer 9 one sides by bolt, in cantilevered axle bearing 28, be provided with driving gear shaft 35 by two cover bearings 29, be provided with driving gear 41 in driving gear shaft 35 rear ends, said driving gear 41 is meshed with driven gear 14, constitute reduction gears mechanism, be connected with wheel hub 34 at driving gear shaft 35 front ends by key, said wheel hub 34 is connected with belt by belt pulley with motor 4 output shafts, be provided with end cap 36 at cantilevered axle bearing 28 outboard ends, said cantilevered axle bearing 28, bearing 29, driving gear shaft 35, wheel hub 34, end cap 36 and belt pulley and belt constitute driving mechanism.Be set with braking system outside cantilevered axle bearing 28, said braking system is made of ratchet 31, brake strap 30, ratchet 32 and rotating shaft 33, and said ratchet 32 is connected with wheel hub 34 by rotating shaft 33.Between main shaft 11 upper ends and seal shaft 10, be provided with bearing 27, be provided with gear box cover 16 in speed reducer 9 upper ends, on gear box cover 16, be provided with bearing 17 and bearing (ball) cover 18, be connected with mechanical sealing base 19 on main shaft 11 tops by key, said bearing 17 inner rings are sleeved on the mechanical sealing base 19, be connected with mechanical seal overcoat 20 on mechanical sealing base 19 tops by key, between mechanical sealing base 19 upper-end surfaces and mechanical seal overcoat 20, be provided with O RunddichtringO 26, said mechanical seal 25 is positioned at mechanical seal overcoat 20, on mechanical seal overcoat 20, be placed with polished rod seal packing 22 in the hole, be processed with homalocephalus in mechanical seal overcoat 20 upper ends.On speed reducer 9 sidewalls, be connected with end cap 15 by bolt.

During use, the polished rod 21 of oil recovery subsurface progressive cavity is passed along support 1, sealing dop 40, connecting sleeve 7, hollow seal axle 10 and mechanical seal overcoat 20, be connected with mechanical seal overcoat 20 by polished rod slips 23.Starting electrical machinery 4, motor 4 drives wheel hub 34 by belt pulley and belt and driving gear shaft 35 rotates, driving gear shaft 35 drives driven gear 14 by driving gear 41 and main shaft 11 rotates, mechanical sealing base 19 and mechanical seal overcoat 20 rotate thereupon, mechanical seal overcoat 20 drives polished rod 21 by polished rod slips 23 and rotates, and realizes driving.When needing repairing mechanical seal, only need releasing of brake band 30, discharge the moment of torsion on the polished rod 21, screwing hermetic dop 40 can keep in repair.

Claims (1)

1, a kind of multifunction combined screw pump surface drive, comprise support (1), on support (1), be provided with motor (4), be provided with speed reducer (9) in support (1) upper end, in speed reducer (9), be provided with reduction gears mechanism, motor (4) output shaft is connected with reduction gears mechanism by driving mechanism, in speed reducer (9), be fastened with stepped hollow seal axle (10), be set with main shaft (11) at seal shaft (10) middle part, main shaft (11) is connected with reduction gears mechanism, be set with mechanical seal (25) on seal shaft (10) top, be provided with seal arrangement on support (1) top, be provided with two sealing dops (40) in the said seal arrangement, on the cylindrical wall of sealing dop (40), be provided with circular groove, in circular groove, be provided with O-ring seal, radially be respectively equipped with half-arc groove (44) at sealing dop (40) interior edge face, it is characterized in that: card tooth (48) is arranged in half-arc groove (44) surface Machining, be provided with horizontal groove (45) at sealing dop (40) interior edge face, horizontal groove (45) communicates with adjacent circular groove, be provided with combination rubber seal (47) in horizontal groove (45) and in the circular groove that is adjacent, be set with mechanical sealing base (19) on main shaft (11) top, be provided with mechanical seal overcoat (20) on mechanical sealing base (19) top, said mechanical seal (25) is positioned at mechanical seal overcoat (20), is provided with O RunddichtringO (26) between mechanical sealing base (19) upper-end surface and mechanical seal overcoat (20).