CN212479566U - Two-end discharge balanced three-screw pump - Google Patents
Two-end discharge balanced three-screw pump Download PDFInfo
- Publication number
- CN212479566U CN212479566U CN202021168426.5U CN202021168426U CN212479566U CN 212479566 U CN212479566 U CN 212479566U CN 202021168426 U CN202021168426 U CN 202021168426U CN 212479566 U CN212479566 U CN 212479566U
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- pump
- driven screw
- screw rod
- shaft end
- inner cover
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Abstract
The utility model relates to a two ends discharge balanced type three-screw pump comprises the pump body, the left inner cup of pump, pump left side axle head cover, pump right side inner cup, pump right side axle head cover, sunction inlet, left side initiative screw rod, right side initiative screw rod, upper left driven screw rod, lower left driven screw rod, upper right driven screw rod, lower right driven screw rod, left side discharge port, right side discharge port, footstep bearing, axle head bush, spline. The working medium enters from a suction inlet arranged on the outer side of the pump body, is conveyed by two groups of mutually meshed driving and driven screws which are symmetrically arranged in the left and right working cavities and are completely the same, and is discharged through end covers on the left and right sides. The two ends of the driving screw and the driven screw are supported by thrust bearings, so that the axial movement of the screws can be eliminated, and the stress state of the screws is greatly improved. The utility model has the advantages of compact structure, small pulsation, stable conveying, convenient adjustment and maintenance, etc.
Description
Technical Field
The utility model belongs to the technical field of hydraulic drive, concretely relates to two end discharge balanced type three-screw pump.
Background
The three-screw pump has the characteristics of stable flow, small pressure pulsation, self-suction capacity, small vibration, high efficiency and the like. Is commonly used in the fields of ships, electric power, machine tools, elevators and the like. The driving screw and the driven screw are used as core components of the three-screw pump, and have the characteristics of complex molded surfaces, high precision requirement on manufacturing and assembling, high processing difficulty and the like.
Typical prior patents for three-screw pumps include: a high-pressure three-screw pump (CN 209621600U) effectively solves the problem that the existing high-pressure screw pump has occlusion phenomenon by arranging a balance sleeve and arranging a step surface at the bottom of a driven screw. A water-based liquid high-pressure three-screw pump (CN 209430400U) is provided for overcoming the defect that the existing screw pump can not convey high-pressure water-based hydraulic liquid medium. A high-flow high-pressure resistant three-screw pump (CN 208870780U) positions the screw, make the principal and subordinate screw and bush keep the uniform interval all the time, will not deflect to one side because of the dead weight, abrade the bush, have guaranteed the service life of each part. At present, the structure of a three-screw pump is limited to a pump in which a pair of driving and driven screws are arranged, a single working chamber is provided, and a medium is sucked from one end of the pump, is subjected to spiral pressure rise, and is discharged from the other end. The driven screw of the traditional three-screw pump has axial floating, can be stressed in the axial direction and the radial direction, has larger axial stress, and is easy to cause vibration and noise.
In order to integrate the defects, the two-end discharge balanced three-screw pump is provided, the left working cavity and the right working cavity are axially arranged, two groups of identical mutually meshed driving screws and driven screws are symmetrically arranged on two sides, and the efficiency of the pump can be improved; the driving screw and the driven screw in the left working cavity and the right working cavity are oppositely arranged so that the axial force is balanced; two ends of the two driven screws are supported by thrust bearings, so that the axial floating structure of the driven screws in the conventional three-screw pump is changed.
Disclosure of Invention
The utility model provides a two-end discharge balanced three-screw pump, which consists of a pump body 1, a pump left inner cover 2, a pump left shaft end cover 3, a pump right inner cover 4, a pump right shaft end cover 5, a suction inlet 6, a left driving screw 7, a right driving screw 8, a left upper driven screw 9, a left lower driven screw 10, a right upper driven screw 11, a right lower driven screw 12, a left discharge outlet 13, a right discharge outlet 14, a thrust bearing 15, a shaft end bushing 16 and a spline 17;
the three-screw pump comprises a pump body 1, a pump left inner cover 2, a pump left shaft end cover 3, a pump right inner cover 4, a pump right shaft end cover 5, a left driving screw 7, a right driving screw 8, an upper left driven screw 9, a lower left driven screw 10, an upper right driven screw 11 and a lower right driven screw 12, wherein the pump left inner cover 2 and the pump right inner cover 4 are fixed on the left and right end faces of the pump body 1 through bolts and are in sealed connection, and adjusting gaskets are arranged between the pump left inner cover 2 and the pump right inner cover 4 and the pump body 1; the pump left shaft end cover 3 is arranged on the left side of the pump left inner cover 2 through a bolt and is sealed through a sealing ring, and the pump right shaft end cover 5 is arranged on the right side of the pump right inner cover 4 through a bolt and is sealed through a sealing ring; a suction inlet 6 is arranged on the outer side of the pump body 1;
two groups of identical mutually-meshed driving screw rods and driven screw rods are symmetrically arranged on two sides in the pump body 1, one end of a left driving screw rod 7 is fixedly connected with a right driving screw rod 8 through a spline 17, one end of an upper left driven screw rod 9 is fixedly connected with an upper right driven screw rod 11 through a spline 17, one end of a lower left driven screw rod 10 is fixedly connected with a lower right driven screw rod 12 through a spline 17, the other ends of the upper left driven screw rod 9 and the lower left driven screw rod 10 are respectively positioned by a left shaft end cover 3 of the pump through thrust bearings 15, shaft end bushings 16 are respectively arranged in driven screw rod mounting holes of a left inner cover 2 of the pump, and sealing baffle rings are respectively arranged in the shaft end bushings 16 for sealing treatment; the stepped shaft shoulder of the left driving screw 7 limits one side of the bearing inner ring, and the pump left inner cover 2 limits the other side of the bearing outer ring; a left discharge port 13 is arranged on the left shaft end cover 3 of the pump;
the right shaft end cover 5 of the pump is used for positioning the upper right driven screw 11 and the lower right driven screw 12 by adopting thrust bearings 15 respectively, shaft end bushings 16 are arranged in driven screw mounting holes of the right inner cover 4 of the pump respectively, and sealing baffle rings are arranged in the shaft end bushings 16 respectively for sealing treatment; the stepped shaft shoulder of the right driving screw 8 limits one side of the bearing inner ring, and the pump right inner cover 4 limits the other side of the bearing outer ring; a right side discharge port 14 is provided in the pump right shaft end cover 5.
The utility model adopts two groups of mutually meshed driving and driven screw rods which are symmetrically arranged on both sides and are completely the same, thus improving the efficiency of the pump; the two ends of the driving screw and the driven screw are supported by thrust bearings, so that the axial movement of the screws can be eliminated, and the stress state of the screws is greatly improved; has the advantages of simple structure, economy, practicality and the like, and has higher practical value.
Drawings
Fig. 1 is an overall structure diagram of the present invention.
Fig. 2 is a sectional view a-a of fig. 1.
Fig. 3 is a half-sectional view of C-C of fig. 2.
Fig. 4 is a left end view of the present invention.
Fig. 5 is a sectional view B-B of fig. 3.
Fig. 6 is a structure view of the driving and driven screws.
Detailed Description
The following describes an implementation of the present invention with reference to the drawings.
Referring to fig. 1, 2, 3, 4, 5 and 6, a two-end discharge balanced three-screw pump is composed of a pump body 1, a pump left inner cover 2, a pump left shaft end cover 3, a pump right inner cover 4, a pump right shaft end cover 5, a suction inlet 6, a left driving screw 7, a right driving screw 8, a left upper driven screw 9, a left lower driven screw 10, a right upper driven screw 11, a right lower driven screw 12, a left discharge outlet 13, a right discharge outlet 14, a thrust bearing 15, a shaft end bushing 16 and a spline 17;
the three-screw pump comprises a pump body 1, a pump left inner cover 2, a pump left shaft end cover 3, a pump right inner cover 4, a pump right shaft end cover 5, a left driving screw 7, a right driving screw 8, an upper left driven screw 9, a lower left driven screw 10, an upper right driven screw 11 and a lower right driven screw 12, wherein the pump left inner cover 2 and the pump right inner cover 4 are fixed on the left and right end faces of the pump body 1 through bolts and are in sealed connection, and adjusting gaskets are arranged between the pump left inner cover 2 and the pump right inner cover 4 and the pump body 1; the pump left shaft end cover 3 is arranged on the left side of the pump left inner cover 2 through a bolt and is sealed through a sealing ring, and the pump right shaft end cover 5 is arranged on the right side of the pump right inner cover 4 through a bolt and is sealed through a sealing ring; a suction inlet 6 is arranged on the outer side of the pump body 1;
two groups of identical mutually-meshed driving screw rods and driven screw rods are symmetrically arranged on two sides in the pump body 1, one end of a left driving screw rod 7 is fixedly connected with a right driving screw rod 8 through a spline 17, one end of an upper left driven screw rod 9 is fixedly connected with an upper right driven screw rod 11 through a spline 17, one end of a lower left driven screw rod 10 is fixedly connected with a lower right driven screw rod 12 through a spline 17, the other ends of the upper left driven screw rod 9 and the lower left driven screw rod 10 are respectively positioned by a left shaft end cover 3 of the pump through thrust bearings 15, shaft end bushings 16 are respectively arranged in driven screw rod mounting holes of a left inner cover 2 of the pump, and sealing baffle rings are respectively arranged in the shaft end bushings 16 for sealing treatment; the stepped shaft shoulder of the left driving screw 7 limits one side of the bearing inner ring, and the pump left inner cover 2 limits the other side of the bearing outer ring; a left discharge port 13 is arranged on the left shaft end cover 3 of the pump;
the right shaft end cover 5 of the pump is used for positioning the upper right driven screw 11 and the lower right driven screw 12 by adopting thrust bearings 15 respectively, shaft end bushings 16 are arranged in driven screw mounting holes of the right inner cover 4 of the pump respectively, and sealing baffle rings are arranged in the shaft end bushings 16 respectively for sealing treatment; the stepped shaft shoulder of the right driving screw 8 limits one side of the bearing inner ring, and the pump right inner cover 4 limits the other side of the bearing outer ring; a right side discharge port 14 is provided in the pump right shaft end cover 5.
The working process of the utility model is as follows:
when a balanced three-screw pump with two-end discharge starts to work, when a motor is started to drive a left driving screw 7 to rotate in the forward direction, the spiral surfaces of the driving screw and the driven screw of the three-screw pump are in contact and meshed with each other, a plurality of sealing cavities are formed among a driving screw spiral groove, a driven screw spiral groove and a pump body 1, the sealing cavities are axially arranged in the pump, a working medium gradually enters from an outer suction inlet 6 of the pump, and is continuously conveyed to a left discharge outlet 13 and a right discharge outlet 14 of the pump through the rotation of the driving screw and the driven screw in the left working cavity and the right working cavity, and the output flow can be changed by changing the rotating speed of the motor, so that the discharge pressure is increased;
when the motor rotates reversely, the driving screw rod rotates reversely, and redundant materials at the discharge port are sucked reversely by utilizing the self-sucking capacity of the three-screw pump, so that the materials are prevented from flowing out.
Claims (2)
1. The utility model provides a two ends discharge balanced type three-screw pump which characterized in that: the pump comprises a pump body (1), a pump left inner cover (2), a pump left shaft end cover (3), a pump right inner cover (4), a pump right shaft end cover (5), a suction inlet (6), a left driving screw (7), a right driving screw (8), a left upper driven screw (9), a left lower driven screw (10), a right upper driven screw (11), a right lower driven screw (12), a left discharge port (13), a right discharge port (14), a thrust bearing (15), a shaft end bushing (16) and a spline (17);
the three-screw pump comprises a pump body (1), a pump left inner cover (2), a pump left shaft end cover (3), a pump right inner cover (4), a pump right shaft end cover (5), a suction inlet (6), a left driving screw (7), a right driving screw (8), a left upper driven screw (9), a left lower driven screw (10), a right upper driven screw (11) and a right lower driven screw (12), wherein the pump left inner cover (2) and the pump right inner cover (4) are fixed on the left and right end faces of the pump body (1) through bolts and are in sealing connection, and adjusting gaskets are arranged between the pump left inner cover (2) and the pump right inner cover (4) and the pump body (1); the pump left shaft end cover (3) is arranged on the left side of the pump left inner cover (2) through a bolt and is sealed through a sealing ring, and the pump right shaft end cover (5) is arranged on the right side of the pump right inner cover (4) through a bolt and is sealed through a sealing ring; a suction port (6) is provided on the outer side of the pump body (1).
2. A two-end discharge balanced three-screw pump according to claim 1, wherein: the pump body (1) is provided with two groups of identical mutually-meshed driving screw rods and driven screw rods which are symmetrically arranged on two sides, one end of a left driving screw rod (7) is fixedly connected with a right driving screw rod (8) through a spline (17), one end of an upper left driven screw rod (9) is fixedly connected with an upper right driven screw rod (11) through a spline (17), one end of a lower left driven screw rod (10) is fixedly connected with a lower right driven screw rod (12) through a spline (17), a left shaft end cover (3) of the pump is used for positioning the upper left driven screw rod (9) and the lower left driven screw rod (10) through thrust bearings (15), shaft end bushings (16) are respectively installed in driven screw rod installation holes of a left inner cover (2) of the pump, and sealing baffle rings are respectively arranged in the shaft end bushings (16) for sealing treatment; the stepped shaft shoulder of the left driving screw (7) limits one side of the bearing inner ring, and the pump left inner cover (2) limits the other side of the bearing outer ring; a left discharge port (13) is arranged on the left shaft end cover (3) of the pump;
the pump right shaft end cover (5) positions a right upper driven screw rod (11) and a right lower driven screw rod (12) by adopting thrust bearings (15), shaft end bushings (16) are respectively installed in driven screw rod installation holes of a pump right inner cover (4), and sealing baffle rings are respectively arranged in the shaft end bushings (16) for sealing treatment; the stepped shaft shoulder of the right driving screw rod (8) limits one side of the bearing inner ring, and the pump right inner cover (4) limits the other side of the bearing outer ring; the right shaft end cover (5) of the pump is provided with a right discharge port (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021168426.5U CN212479566U (en) | 2020-06-22 | 2020-06-22 | Two-end discharge balanced three-screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021168426.5U CN212479566U (en) | 2020-06-22 | 2020-06-22 | Two-end discharge balanced three-screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212479566U true CN212479566U (en) | 2021-02-05 |
Family
ID=74413305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021168426.5U Expired - Fee Related CN212479566U (en) | 2020-06-22 | 2020-06-22 | Two-end discharge balanced three-screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212479566U (en) |
-
2020
- 2020-06-22 CN CN202021168426.5U patent/CN212479566U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210205 Termination date: 20210622 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |