CN211059004U

CN211059004U - Rotor for screw pump

Info

Publication number: CN211059004U
Application number: CN201920751342.5U
Authority: CN
Inventors: 孙秋云
Original assignee: Nanjing Caiyun Machinery & Electronics Manufacturing Group Co ltd
Current assignee: Nanjing Caiyun Machinery & Electronics Manufacturing Group Co ltd
Priority date: 2019-05-23
Filing date: 2019-05-23
Publication date: 2020-07-21
Anticipated expiration: 2029-05-23

Abstract

The utility model discloses a rotor for screw pump, including rotor body (11) and joint (12), joint (12) and rotor body (11) eccentric settings and both formula structures as an organic whole, rotor body's (11) diameter from being used for with the one end of being connected of joint (12) to keeping away from the one end of connecting (12) by the little gradual change of size. The utility model has the advantages that: the utility model discloses a long service life has reduced the utility model discloses a use cost.

Description

Rotor for screw pump

Technical Field

The utility model relates to a rotor that screw pump was used.

Background

The screw pump is one of the commonly used tools, especially a single-screw pump, and its main working components are a screw (called rotor) with an eccentric spiral body and a screw bushing (called stator) with a double-line spiral surface on the inner surface. The working principle is that when the motor drives the pump shaft to rotate, the screw rod rotates around the axis of the screw rod, and rolls along the inner surface of the lining, so that a sealed chamber of the pump is formed. The liquid in the sealing cavity is pushed forward by a screw pitch every circle of the screw, the liquid is pressed from one sealing cavity to the other sealing cavity in a spiral mode along with the continuous rotation of the screw, and finally a pump body is extruded out.

Disclosure of Invention

The utility model aims at providing a rotor for screw pump solves among the prior art stator that the rotor for screw pump wearing and tearing screw pump used and leads to the short technical defect of screw pump life.

In order to solve the above problems, the utility model adopts the following technical proposal: the utility model provides a rotor for screw pump, includes rotor body and joint, joint and rotor body eccentric settings and both formula structures as an organic whole, rotor body's diameter from being used for with articulate one end to keeping away from the one end of connecting by the size gradual change. The utility model provides a rotor is because the diameter at both ends is different, and after the stator internal surface that the screw pump was used has worn and torn to some extent, can promote rotor body towards the less one end of diameter, makes the great part of one end diameter that rotor body is close to the joint laminate with the stator internal surface for the screw pump mutually, ensures that rotor body and the stator contact that the screw pump was used are better, and does not need the stator that often changes the screw pump and use, improves the life of whole screw pump.

As a further improvement of the utility model, the one end that the rotor body kept away from the joint is provided with the radius angle. The utility model discloses establish the pavilion fillet, when with the stator installation that screw pump was used, can not produce the stator and destroy, improve the utility model provides an economic nature.

To sum up, the beneficial effects of the utility model are that: the utility model discloses a long service life has reduced the utility model discloses a use cost.

Drawings

Fig. 1 is a schematic structural view of a rotor for a medium screw pump, which reflects the present invention.

Fig. 2 is a sectional view a-a of fig. 1.

Fig. 3 is a sectional view B-B of fig. 1.

Fig. 4 is a schematic structural view of a stator for a screw pump, which reflects the use of the present invention.

Fig. 5 is a cross-sectional view C-C of fig. 4.

Fig. 6 is a cross-sectional view E-E of fig. 4.

Fig. 7 is a schematic structural view of a screw pump manufactured by the present invention.

Wherein: 11. a rotor body; 12. a joint; 13. and (6) rounding off.

21. A stator body; 22. a stator housing; 23. and a rotor mounting hole.

31. A suction chamber; 32. a discharge chamber; 33. a rotating shaft; 34. a first universal joint; 35. a second universal joint; 36. a pull rod; 37. a first stator bayonet; 38. a second stator bayonet; 39. a first fixing projection; 310. a second fixing projection; 311. a discharge through hole; 312. a suction chamber; 313. a suction inlet; 314. and (7) discharging the air.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

The rotor for screw pump as shown in fig. 1 comprises a rotor body 11 and a joint 12, the cross section of the rotor body 11 and the joint 12 perpendicular to the length direction is circular, wherein the diameter of the joint 12 is slightly smaller than that of the rotor body 11, the joint 12 and the rotor body 11 are eccentrically arranged and are of an integral structure, the joint 12 and the rotor body 11 can be manufactured separately and then fixed in a welding mode, and can also be manufactured in an integral manufacturing mode, the utility model discloses a cylindrical metal rod is integrally manufactured, and the diameter of the rotor body 11 gradually changes from the end used for being connected with the joint 12 to the end far away from the joint 12. As shown in fig. 1, the diameter of the end of the rotor body 11 connected to the joint 12 is D1, and the diameter of the end of the rotor body 11 far away from the joint 12 is D2, wherein D1 is slightly larger than D2.

The utility model discloses preferred rotor body 11 keep away from the one end that connects 12 and be provided with radius 13.

The stator used in the present invention, as shown in fig. 2, includes a stator body 21 and a stator housing 22, the stator body 21 is arranged in the stator housing 22 and fixed with the stator housing 22, the stator body 21 is provided with a stator spiral hole 23 along the length direction for mounting a rotor, the section of the stator spiral hole 23 is in an oblong shape, the pitch of the stator spiral hole 23 is constant, the pitch of the stator spiral hole 23 is equal to the pitch of the rotor body 11 arranged in the stator spiral hole, the rotor body 11 extends into the stator spiral hole 23, the diameter of the circular arc part of the section of the stator spiral hole 23 gradually changes from large to small from one end of the stator body 21 to the other end, and the length of the straight line part of the section of the stator spiral hole 23 gradually changes from large to small from one end of the stator body 21 to the other end, so that the stator spiral hole 23 is matched with the rotor body 11; as shown in fig. 2, the diameter of the circular arc portion of the cross section of one end of the stator spiral hole 23 is D3, the diameter of the circular arc portion of the cross section of the other end is D4, wherein D3 > D4, the utility model provides a D3 slightly is greater than D4 can, the length of the stator body 21 in this embodiment is less than the length of the rotor body 11.

The utility model discloses in stator overcoat 22 be the steel bushing, rotor body 11 be rubber material (nitrile rubber), rotor body 11 the pouring in the steel bushing.

As shown in fig. 3, the single screw pump includes a suction chamber 31, a discharge chamber 32, a rotor for the screw pump, a stator for the screw pump, and a transmission shaft 33, wherein the discharge chamber 32 includes a discharge chamber body, the discharge chamber body has a discharge through hole 311 penetrating both ends of the rotor body 11 along a length direction of the rotor body, a cross section of the discharge through hole 311 is circular, the discharge chamber 32 is connected to the stator for the screw pump, a rotor mounting hole 23 of the stator body 21 is communicated with the discharge through hole 311, the suction chamber 31 includes a suction chamber body, the suction chamber body has a suction cavity 312 along a length direction of the stator body 21, the suction chamber body has a suction port 313 for fluid to enter the suction chamber along a direction perpendicular to the length direction of the stator body 21, one end of the suction chamber body near the discharge chamber has a discharge port 314 for fluid to be transferred into the stator body 21, one end of the stator for the screw pump is connected with the suction chamber 31 through the discharge port 314 and the rotor mounting hole 23 on the stator body is communicated with the suction chamber 312, the rotor body 11 is arranged in the stator body 21, the joint 12 is connected with the transmission shaft 33 through the first universal joint 34, the other end of the transmission shaft 33 is connected with a driving motor (not shown in the figure) for driving the rotor for the screw pump to rotate in the stator for the screw pump through the second universal joint 35, the discharge chamber 32 and the suction chamber 31 are respectively detachably mounted at two ends of the stator for the screw pump, and the first universal joint 34, the second universal joint 35 and the transmission shaft 33 are all positioned in the suction chamber 31. The transmission shaft 33 of the present invention is a telescopic transmission shaft, such as the transmission shaft disclosed in the chinese patent application with the application number of 201710329545.0.

The utility model discloses in suction chamber 31 and discharge chamber 32 connect through more than two pull rods 36, pull rods 36 produce the pulling force to suction chamber 31 and discharge chamber 32 towards opposite direction, press from both sides the stator clamp that the screw pump was used between suction chamber 31 and discharge chamber 32. The utility model discloses in discharge chamber body on be close to the one end of suction chamber 31 and open and to have first stator bayonet socket 37, suction chamber 31 on be close to the one end of discharge chamber 32 and open and to have second stator bayonet socket 38, the both ends of the stator that the screw pump was used stretch into respectively in first stator bayonet socket 37 and the second stator bayonet socket 38.

Discharge chamber 32 on along the even first fixed protrusion 39 that is equipped with quantity and the quantity that pull rod 36 equals of its circumferencial direction, first fixed protrusion 39 open along the length direction of the stator that the screw pump was used for fixed pull rod 36's first fixed through-hole, suction chamber 31 on along the even second fixed protrusion 310 that is equipped with quantity and the quantity that pull rod 36 equals of its circumferencial direction, second fixed protrusion 310 on open along the length direction of the stator that the screw pump was used for fixed pull rod 36's second fixed through-hole.

The utility model discloses in first fixing hole and second fixing hole be glossy through-hole, pull rod 36's both ends all be provided with the screw thread first fixed protrusion 39 keep away from one side of second fixed protrusion 310 and one side that first fixed protrusion 39 was kept away from to second fixed protrusion 310 be provided with first coupling nut and second coupling nut respectively, pull rod 36's both ends pass behind first fixing hole and the second fixed hole respectively with first coupling nut and second coupling nut screw-thread fit, through adjusting first coupling nut and/or second coupling nut position on pull rod 36 for suction chamber 31 and discharge chamber 32 press from both sides tightly or loosen the stator that the screw pump was used.

The utility model discloses in first fixing hole and second fixing hole also can be the screw hole, the both ends of pull rod 36 be provided with respectively and revolve to opposite screw thread, 36 both ends of pull rod respectively with first fixing hole and second fixing hole threaded connection, and the middle part of pull rod 36 be provided with connecting portion, connecting portion along the radial cross sectional shape of screw rod for the polygon to make things convenient for pull rod 36's rotation.

Stator body 21's life-span is about 800 hours, and about 1600 hours of life-span of rotor body 11, prior art's screw pump is when using 800 hours about, stator body wearing and tearing, its leakproofness descends, be difficult to keep due pressure, stator body 21 will be changed, as shown in fig. 3, only need to make rotor body 11 and stator body 21 contact towards the direction removal of keeping away from joint 12 with rotor body 11, ensure leakproofness between them, and need not to change stator body 21, for example can reuse 500 hours, remove rotor body 11 once more, can realize stator body 11 at last basically and rotor body 21's live time is equivalent, the utility model discloses a life of screw pump improves about 1600 hours, the utility model discloses a great pair has improved the holistic life of screw pump, reduces the utility model discloses a use cost.

Parts which are not specifically described in the above description are prior art or can be realized by the prior art. The specific embodiments of the present invention are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. All equivalent changes and modifications made according to the content of the claims of the present invention should be regarded as the technical scope of the present invention.

Claims

1. The utility model provides a rotor for screw pump, includes rotor body (11) and connects (12), connect (12) and rotor body (11) eccentric settings and both formula structures as an organic whole, its characterized in that: the diameter of the rotor body (11) gradually changes from the end used for being connected with the joint (12) to the end far away from the joint (12).

2. The rotor for a screw pump according to claim 1, wherein: and a fillet (13) is arranged at one end of the rotor body (11) far away from the joint (12).