CN201836043U

CN201836043U - Parallel connection type double-screw pump

Info

Publication number: CN201836043U
Application number: CN2010202430590U
Authority: CN
Inventors: 倪文凯
Original assignee: JIANGXI KAIFENG PUMP CO Ltd
Current assignee: JIANGXI KAIFENG PUMP CO Ltd
Priority date: 2010-06-30
Filing date: 2010-06-30
Publication date: 2011-05-18
Anticipated expiration: 2020-06-30

Abstract

The utility model discloses a parallel connection type double-screw pump, which comprises a pump body, a pump core, a medium inlet and outlet opening, a front end cover, a back end cover and a machine sealing cover, wherein a pump cavity is arranged in the middle of the pump core. The utility model is characterized in that the right end of a gear shaft is connected with a main shaft of a driving machine, the left end of the gear shaft extending in a gear cavity is sheathed with a main gear, two groups of mutually engaged driving screw rods and driven screw rods are placed in the pump cavity, two driving screw rod gears are respectively engaged with the main gear, and driving screw rod friction wheels and driven screw rod friction wheels positioned in a back cavity are mutually engaged. Through the engagement of the gear shaft and two driving gears, the motive power is transmitted to the driving screw rods, and the driving torque moment is transmitted to the driven screw rods by the driving screw rods. The parallel connection type double-screw pump has the advantages of compact structure, small size and low manufacture cost and can effectively save energy and reduce the consumption. Under the condition without enlarging the diameter of the screw rods or improving the rotation speed of the pump, the flow rate of the pump can be increased by two times.

Description

A kind of parallel connection type double-screw-rod pump

Technical field

The utility model relates to screw pump, especially relates to a kind of parallel connection type double-screw-rod pump.

Background technique

Screw pump is a kind of positive displacement pump, and the size of its theoretical delivery is directly proportional with the diameter of screw rod, pitch and rotating speed.Therefore, enlarge the flow of screw pump, preferred option is diameter and the pitch that increases screw rod, but after the diameter of screw rod increases to a certain degree, will be subjected to all multifactor restrictions such as linear velocity, pump vacuum suction head, screw rod processing technology of pump rotor, make the flow that will increase pump more just become more and more difficult.

Summary of the invention

The purpose of this utility model is to provide a kind of can save energy and reduce the cost effectively, compact structure, volume are little, the parallel connection type double-screw-rod pump of low cost of manufacture, it does not improve in the diameter that does not both enlarge screw rod and pitch under the situation of rotating speed of pump yet, and the flow of pump is doubled.

The purpose of this utility model is achieved in that the utility model comprises base, the pump housing, be placed in the pump core in the pump housing, rear end cover, top cover, front cover, bearing support and machine capping, in the centre of the pump housing and pump core is pump chamber, between pump core and rear end cover, form back cavity, the medium inlet that communicates with pump chamber is positioned at the left side at pump housing rear portion, the media outlet that communicates with pump chamber is positioned at the right side of pump housing front portion, be respectively equipped with heat conduction source inlet and the outlet of heat conduction source that has been used for conductive force in the rear and front end of the pump housing, in order to introduce the heat conduction source is that the high medium of viscosity is heated, feature is: be fixed with gear box cover between bearing support and machine capping, front cover, bearing support, formative gear chamber between gear box cover and the machine capping, the right-hand member of gear shaft connects with the main shaft of driving machine by coupling, the left end of gear shaft stretches in the gear cavity, and the left end at gear shaft is with roller bearing from left to right successively, master gear, gear cavity angular contact ball bearing and mechanical seal ring, pairing is placed with two groups of intermeshing active screw rods and driven screw rod in pump chamber, wherein: the right-hand member at the spiral molded lines of active screw rod is with right active slip bearing from left to right successively, angular contact ball bearing and active screw gear, be with left active slip bearing and screw rod friction wheel initiatively from right to left successively at the left end of the spiral molded lines of active screw rod, right-hand member at the spiral molded lines of driven screw rod is with right driven sliding bearing, is with left driven sliding bearing and driven screw rod friction wheel from right to left successively at the left end of the spiral molded lines of driven screw rod;

Be arranged in two equal and gear of active screw gears of gear cavity, the active screw rod friction wheel and the driven screw rod friction wheel that are arranged in back cavity are meshing with each other.

Be provided with a dividing plate that pump chamber is divided into screw rod chamber, two 8 word holes at the middle part of pump core, rear and front end at dividing plate is processed with through hole, make the rear and front end in two screw rod chambeies all interconnect, two groups of intermeshing active screw rods and driven screw rod match respectively and are placed in the screw rod chamber, two 8 word holes.

The utility model is assembled in two groups of driving and driven screw rods in the pump chamber, by the master gear on the gear shaft and two initiatively the gear on the screw rod be meshed, the power of driving machine is passed to two initiatively screw rods respectively, initiatively screw rod again to the driven screw rod transfer drive torque of its engagement, thereby formed a kind of parallel two screw pump structure.The utility model just equals two two screw pumps are pieced together in pump housing, makes the output flow of pump increase by one times; Since in the rear and front end of pump core respectively radially direct four square through holes, pumping liquid is driven by the spiral chute of driving and driven screw rod, enter the spiral molded lines of driving and driven screw rod respectively from four square through holes of pump core rear end, constantly rotate the movable sealing chamber of formation via driving and driven screw rod, pumping liquid is constantly discharged to four of pump core front end square through holes, be transported to the media outlet of pump again.

Therefore, the utlity model has following advantage: 1, also do not improve under the situation of revolution speed at diameter that does not both enlarge screw rod and pitch, and the flow that makes pump has increased by one times, and the vacuum suction head of the linear velocity of pump rotor, pump is still identical with the driving and driven screw pump of single group, that is to say that compare with the pump of equal flow, pump rotor linear velocity of the present utility model is low, and the vacuum suction head wants high, thereby has optimized pump performance greatly.2, the utility model is equivalent to two pumps is bolted together, so the utility model is compared with the pump of equal flow, has that compact structure, volume are little, the characteristics of low cost of manufacture, can save energy and reduce the cost effectively.3, the utility model scheme is that this scheme can also be expanded and be applied to double suction two screw pump and three screw pump with the single suction two screw pump for example, for screw pump enlarges flow, optimizes performance and opens up a new way.

Description of drawings

Fig. 1 is a schematic top plan view of the present utility model;

Fig. 2 be among Fig. 1 A-A to cross-sectional schematic;

Fig. 3 be among Fig. 2 B-B to cross-sectional schematic;

Fig. 4 be among Fig. 2 C-C to cross-sectional schematic;

Fig. 5 be among Fig. 1 D-D to cross-sectional schematic.

Embodiment

Below in conjunction with embodiment and contrast accompanying drawing the utility model is described in further detail.

The utility model comprises base 14, the pump housing 2, be placed in the pump core 13 in the pump housing 2, rear end cover 3, top cover 4, front cover 7, bearing support 8 and machine capping 10, between the pump housing 2 and pump core 13, be pump chamber 15, between pump core 13 and rear end cover 3, form back cavity 29, the medium inlet 1 that communicates with pump chamber 15 is positioned at the left side at the pump housing 2 rear portions, the media outlet 6 that communicates with pump chamber 15 is positioned at the right side of the pump housing 2 front portions, be respectively equipped with heat conduction source inlet 12 and the heat conduction source outlet 5 that has been used for conductive force in the rear and front end of the pump housing 2, in order to introduce the heat conduction source is that the high medium of viscosity is heated, between bearing support 8 and machine capping 10, be fixed with gear box cover 9, front cover 7, bearing support 8, formative gear chamber 21 between gear box cover 9 and the machine capping 10, the right-hand member of gear shaft 11 connects with the main shaft of driving machine by coupling, the left end of gear shaft 11 stretches in the gear cavity 21, and is with roller bearing 31 from left to right successively at the left end of gear shaft 11, master gear 32, gear cavity angular contact ball bearing 22 and mechanical seal ring 30; Pairing is placed with two groups of intermeshing active screw rods 18 and driven screw rod 16 in pump core 13, wherein: the right-hand member at the spiral molded lines 23 of active screw rod 18 is with right active slip bearing 24 from left to right successively, angular contact ball bearing 25 and active screw gear 26, be with left active slip bearing 27 and screw rod friction wheel 28 initiatively from right to left successively at the left end of the spiral molded lines 23 of active screw rod 18, right-hand member at the spiral molded lines 35 of driven screw rod 16 is with right driven sliding bearing 36, is with left driven sliding bearing 34 and driven screw rod friction wheel 33 from right to left successively at the left end of the spiral molded lines 35 of driven screw rod 16;

Two active screw gears 26 that are arranged in gear cavity 21 all mesh with master gear 32, and the active screw rod friction wheel 28 and the driven screw rod friction wheel 33 that are arranged in back cavity 29 are meshing with each other.

When pairing is placed with two groups of intermeshing active screw rods 18 and driven screw rod 16 in pump chamber 15, be provided with a dividing plate 19 that pump core 13 is divided into screw rod chamber, two 8 word holes 17 at the middle part of pump core 13, be processed with through hole 20 in the rear and front end of dividing plate 19, make the front-end and back-end in two screw rod chambeies 17 all interconnect, two groups of intermeshing

active screw rods

18 and 16 pairings of driven screw rod are placed in the screw rod chamber, two 8 word holes 17.

Claims

1. parallel connection type double-screw-rod pump, comprise base (14), the pump housing (2), be placed in the pump core (13) in the pump housing (2), rear end cover (3), top cover (4), front cover (7), bearing support (8) and machine capping (10), between the pump housing (2) and pump core (13), be pump chamber (15), between pump core (13) and rear end cover (3), form back cavity (29), the medium inlet (1) that communicates with pump chamber (15) is positioned at the left side at the pump housing (2) rear portion, the media outlet (6) that communicates with pump chamber (15) is positioned at the anterior right side of the pump housing (2), be respectively equipped with heat conduction source inlet (12) and the heat conduction source outlet (5) that has been used for conductive force in the rear and front end of the pump housing (2), it is characterized in that: between bearing support (8) and machine capping (10), be fixed with gear box cover (9), front cover (7), bearing support (8), formative gear chamber (21) between gear box cover (9) and the machine capping (10), the right-hand member of gear shaft (11) connects with the main shaft of driving machine by coupling, the left end of gear shaft (11) stretches in the gear cavity (21), and is with roller bearing (31) from left to right successively at the left end of gear shaft (11), master gear (32), gear cavity angular contact ball bearing (22) and mechanical seal ring (31); Pairing is placed with two groups of intermeshing active screw rods (18) and driven screw rod (16) in pump core (13), wherein: the right-hand member at the spiral molded lines (23) of active screw rod (18) is with right active slip bearing (24) from left to right successively, angular contact ball bearing (25) and active screw gear (26), be with left active slip bearing (27) and screw rod friction wheel (28) initiatively from right to left successively at the left end of the spiral molded lines (23) of active screw rod (18), right-hand member at the spiral molded lines (35) of driven screw rod (16) is with right driven sliding bearing (36), is with left driven sliding bearing (34) and driven screw rod friction wheel (33) from right to left successively at the left end of the spiral molded lines (35) of driven screw rod (16);

Two the active screw gears (26) that are arranged in gear cavity (21) all mesh with master gear (32), and the active screw rod friction wheel (28) and the driven screw rod friction wheel (33) that are arranged in back cavity (29) are meshing with each other.

2. parallel connection type double-screw-rod pump as claimed in claim 1, it is characterized in that: pairing is placed with two groups of intermeshing active screw rods (18) and driven screw rod (16) in pump chamber (15), be provided with a dividing plate (19) that pump core (13) is divided into screw rod chamber, two 8 word holes (17) at the middle part of pump core (13), be processed with through hole (20) at the two ends, the left and right sides of dividing plate (19), make the front-end and back-end in two screw rod chambeies (17) all interconnect, two groups of intermeshing active screw rods (18) and driven screw rod (16) pairing are placed in the screw rod chamber, two 8 word holes (17).