CN215333400U - Combined supporting and positioning double-suction double-screw pump - Google Patents
Combined supporting and positioning double-suction double-screw pump Download PDFInfo
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- CN215333400U CN215333400U CN202121721100.5U CN202121721100U CN215333400U CN 215333400 U CN215333400 U CN 215333400U CN 202121721100 U CN202121721100 U CN 202121721100U CN 215333400 U CN215333400 U CN 215333400U
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Abstract
The utility model discloses a combined supporting and positioning double-suction double-screw pump which comprises a pump body, a driving screw and a driven screw, wherein the driving screw and the driven screw are arranged in the pump body along the axial direction of the pump body, one end of the pump body is provided with a front end cover, the other end of the pump body is provided with a rear end cover, two radial positioning pieces are respectively arranged in the front end cover and the rear end cover, two ends of the driving screw and the driven screw penetrate through the radial positioning pieces, a bearing seat and a gear box are also arranged on the front end cover, two axial positioning pieces are arranged in the bearing seat, and the driving screw and the driven screw are respectively axially positioned through one axial positioning piece. The utility model can ensure that the pump runs stably, has long service life and is convenient to maintain.
Description
Technical Field
The utility model relates to a screw pump, in particular to a combined supporting and positioning double-suction double-screw pump.
Background
The structure of the existing double-suction double-screw pump refers to fig. 1, and the double-suction double-screw pump mainly comprises a driving screw 1, a driven screw 2, a mechanical seal 3, an angular contact ball bearing 4, a front bearing seat 7, a rear bearing seat 8 and a roller bearing 9. The driving screw 1 and the driven screw 2 are simultaneously and radially positioned and supported by the angular contact ball bearings 4 and the roller bearings 9 which are arranged on the respective screws, and the driving screw 1 and the driven screw 2 are axially positioned by the angular contact ball bearings 4 which are arranged on the respective screws.
The fit clearance of the rolling bearing and the shaft parts is small when the rolling bearing and the shaft parts are installed, the control precision requirement is high, the general control precision is about 0.01-0.03mm, the rolling bearing is used for radial support and axial positioning on the existing double-suction double-screw pump, and the complex support positioning structures of the four rolling bearings enable the product assembly work to have high technical requirements and great difficulty, so that the complex support positioning structures are not beneficial to rapid overhaul and maintenance of a user site.
The angular contact ball bearing 4 is used for not only axially positioning the screw rod, but also radially supporting, and the angular contact ball bearing 4 bears larger radial load and is easy to damage.
The driving screw 1 and the driven screw 2 are supported by the angular contact ball bearings 4 and the roller bearings 9 which are installed on the respective screws, the angular contact ball bearings 4 are installed on the front bearing seat 7 outside the pump body, the roller bearings 9 are all installed on the rear bearing seat 8 outside the pump body, so that the screw supporting span distance L is long (as shown in the figure), the screw forms large bending deformation under stress when the pump operates, and the operation stability of the pump is poor.
The driving screw rod 1 and the driven screw rod 2 are respectively provided with two mechanical seals 3 to realize axial sealing, four mechanical seals are required to be installed on the pump and serve as quick-wear parts, the more mechanical seals are used, the higher the probability that the conveyed medium leaks to the environment is, the more the mechanical seals are used, the management of the field environment and the safety is not facilitated, and the equipment maintenance cost is also high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a combined supporting and positioning double-suction double-screw pump, which solves the technical problems in the prior art, can ensure that the pump runs stably, has long service life and is convenient to maintain.
The utility model provides a combined supporting and positioning double-suction double-screw pump which comprises a pump body, a driving screw and a driven screw, wherein the driving screw and the driven screw are arranged in the pump body along the axial direction of the pump body, one end of the pump body is provided with a front end cover, the other end of the pump body is provided with a rear end cover, two radial positioning pieces are respectively arranged in the front end cover and the rear end cover, two ends of the driving screw and two ends of the driven screw penetrate through the radial positioning pieces, the front end cover is also provided with a bearing seat and a gear box, two axial positioning pieces are arranged in the bearing seat, and the driving screw and the driven screw are respectively axially positioned through one axial positioning piece.
In the aforementioned double suction double screw pump that combination supported location, preferably, radial setting element is the slip axle sleeve, be provided with two in the front end housing the slip axle sleeve, the initiative screw rod with the one end of driven screw rod respectively with two in the front end housing slip axle sleeve plug-in connection, be provided with two in the rear end housing the slip axle sleeve, the initiative screw rod with the other end of driven screw rod respectively two in the rear end housing slip axle sleeve plug-in connection, the slip axle sleeve is used for right the initiative screw rod with driven screw rod carries out radial spacing and radial support.
In the above-mentioned combined support positioning double-suction double-screw pump, preferably, two sealing cavities are formed in the bearing seat, axial sealing elements are disposed in both of the two sealing cavities, one of the axial sealing elements is disposed on the driving screw, and the other axial sealing element is disposed on the driven screw.
In the above-mentioned combined support-positioning double-suction double-screw pump, preferably, the axial sealing element is a single-end-face mechanical seal, a double-end-face mechanical seal, a packing seal, or a skeleton oil seal.
In the above combined supporting and positioning double-suction double-screw pump, preferably, two pinion gears are arranged in the gear box, one of the pinion gears is fixed on the driving screw, the other pinion gear is fixed on the driven screw, and the two pinion gears are engaged with each other.
In the above-mentioned combined supported and positioned double-suction twin-screw pump, preferably, one end of the driving screw, on which the pinion is mounted, penetrates through the gear box.
In the above-mentioned double-suction double-screw pump with combined supporting and positioning, preferably, the axial positioning element is an angular contact ball bearing, a deep groove ball bearing, or a four-point contact ball bearing.
Compared with the prior art, the axial positioning device comprises a pump body, a driving screw and a driven screw, wherein the driving screw and the driven screw are arranged in the pump body along the axial direction of the pump body, one end of the pump body is provided with a front end cover, the other end of the pump body is provided with a rear end cover, two radial positioning pieces are respectively arranged in the front end cover and the rear end cover, two ends of the driving screw and two ends of the driven screw penetrate through the radial positioning pieces, a bearing seat and a gear box are further arranged on the front end cover, two axial positioning pieces are arranged in the bearing seat, and the driving screw and the driven screw are respectively axially positioned through one axial positioning piece. The utility model uses the radial positioning piece to limit the radial freedom degree of the driving screw and the driven screw and plays a supporting role, so that the axial positioning piece is not influenced by the radial force any more, and the service life of the axial positioning piece is effectively prolonged. In addition, the mode that the axial positioning piece is matched with the radial positioning piece is adopted, so that the axial positioning piece is convenient to disassemble, assemble and maintain, and the maintenance cost is reduced.
Drawings
FIG. 1 is a schematic diagram of a prior art twin screw pump;
fig. 2 is a schematic structural diagram of the present invention.
Description of reference numerals: 1-driving screw, 2-driven screw, 3-mechanical seal, 4-angular contact ball bearing, 5-axial seal, 7-front bearing seat, 8-rear bearing seat, 9-roller bearing, 10-pump body, 11-driving screw, 12-driven screw, 13-front end cover, 14-rear end cover, 15-bearing seat, 16-gear box, 17-radial positioning piece, 18-axial positioning piece and 19-pinion.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the utility model.
The embodiment of the utility model comprises the following steps: as shown in fig. 2, a combined supporting and positioning double-suction double-screw pump comprises a pump body 10, a driving screw 11 and a driven screw 12, wherein a liquid inlet and a liquid outlet are formed in the side wall of the pump body 10, the driving screw 11 and the driven screw 12 are installed in the pump body 10 along the axial direction of the pump body 10, the driving screw 11 and the driven screw 12 are engaged with each other, a front end cover 13 is arranged at one end of the pump body 10, a rear end cover 14 is arranged at the other end of the pump body, two radial positioning members 17 are respectively arranged in the front end cover 13 and the rear end cover 14, both ends of the driving screw 11 and the driven screw 12 pass through the radial positioning members 17, namely, one end of the driving screw 11 is rotatably connected with the front end cover 13 through a radial positioning piece 17, the other end of the driving screw is rotatably connected with the rear end cover 14 through a radial positioning piece 17, one end of the driven screw 12 is rotatably connected with the front end cover 13 through a radial positioning piece 17, and the other end of the driven screw is rotatably connected with the rear end cover 14 through a radial positioning piece 17; the front end cover 13 is further provided with a bearing seat 15 and a gear box 16, two axial positioning pieces 18 are arranged in the bearing seat 15, and the driving screw 11 and the driven screw 12 are axially positioned through one axial positioning piece 18 respectively.
Through the setting of radial positioning piece 17, can support and spacing driving screw 11 and driven screw 12 in footpath, effectively reduce axial positioning piece 18's radial load, prolong axial positioning piece 18's life. The combined supporting and positioning structure formed by the radial positioning piece 17 and the axial positioning piece 18 not only facilitates the installation and the disassembly, but also reduces the maintenance difficulty and prolongs the service life of the pump.
The radial positioning element 17 is a sliding shaft sleeve, two sliding shaft sleeves are arranged in the front end cover 13, one ends of the driving screw rod 11 and the driven screw rod 12 are respectively in plug-in connection with the two sliding shaft sleeves in the front end cover 13, two sliding shaft sleeves are arranged in the rear end cover 14, the other ends of the driving screw rod 11 and the driven screw rod 12 are respectively in plug-in connection with the two sliding shaft sleeves in the rear end cover 14, and the sliding shaft sleeves are used for radially limiting and radially supporting the driving screw rod 11 and the driven screw rod 12. The axial positioning member 18 is an angular contact ball bearing or a deep groove ball bearing or a four-point contact ball bearing.
The precision of the matching of the sliding shaft sleeve and the driving screw rod 11 and the driven screw rod 12 can be controlled to be 0.1mm-0.2mm or larger, and the structure of the product is relatively simple, so that the technical difficulty of assembly work is greatly reduced, and the quick overhaul and maintenance of a user site are facilitated. In addition, the sliding shaft sleeves are arranged on the front end cover 13 and the rear end cover 14, so that the screw support span length L becomes short, the rigidity of the driving screw 11 and the driven screw 12 is greatly improved, the bending deformation of the driving screw 11 and the driven screw 12 is small when the pump is stressed during operation, and the operation stability of the pump is high.
In a preferred embodiment, two sealing chambers are formed in the bearing housing 15, in each of which an axial seal 5 is arranged, wherein one axial seal 5 is arranged on the drive screw 11 and the other axial seal 5 is arranged on the driven screw 12. The axial seal 5 may be a single-ended mechanical seal or a double-ended mechanical seal or a stuffing seal or a skeleton oil seal.
The axial sealing of the pump can be realized by respectively installing a set of axial sealing element 5 on the driving screw 11 and the driven screw 12. The number of the axial sealing elements 5 is only two, the number is small, the probability of leakage of the conveyed medium is greatly reduced, and meanwhile, the operation and maintenance cost of the equipment is reduced.
Further, two pinion gears 19 are disposed in the gear box 16, wherein one pinion gear 19 is fixed on the driving screw 11, the other pinion gear 19 is fixed on the driven screw 12, and the two pinion gears 19 are engaged with each other. The driving screw 11 has an end mounted with a pinion 19 penetrating the gear box 16, and the end is provided with a key groove for connecting with a power device.
The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.
Claims (7)
1. The utility model provides a combination supports double entry double screw pump of location, includes the pump body (10), initiative screw rod (11) and driven screw rod (12), its characterized in that: initiative screw rod (11) with driven screw rod (12) are followed the axial of the pump body (10) is installed in the pump body (10), the one end of the pump body (10) is provided with front end housing (13), and the other end is provided with rear end housing (14), front end housing (13) with be provided with two radial setting element (17) in rear end housing (14) respectively, initiative screw rod (11) with the both ends of driven screw rod (12) are all passed radial setting element (17), still be provided with bearing frame (15) and gear box (16) on front end housing (13), be provided with two axial setting element (18) in bearing frame (15), initiative screw rod (11) with driven screw rod (12) are respectively through one axial setting element (18) carry out axial positioning.
2. The combination support and positioning double-suction twin-screw pump according to claim 1, wherein: radial setting element (17) is the slip axle sleeve, be provided with two in front end housing (13) the slip axle sleeve, initiative screw rod (11) with the one end of driven screw rod (12) respectively with two in front end housing (13) slip axle sleeve plug-in connection, be provided with two in rear end housing (14) the slip axle sleeve, initiative screw rod (11) with the other end of driven screw rod (12) respectively with two in rear end housing (14) slip axle sleeve plug-in connection, the slip axle sleeve be used for right initiative screw rod (11) with driven screw rod (12) carry out radial spacing and radial support.
3. The combination support and positioning double-suction twin-screw pump according to claim 1, wherein: two sealing cavities are formed in the bearing seat (15), axial sealing elements (5) are arranged in the two sealing cavities, one of the axial sealing elements (5) is arranged on the driving screw rod (11), and the other axial sealing element (5) is arranged on the driven screw rod (12).
4. A combination support and positioning double-suction twin-screw pump according to claim 3, wherein: the axial sealing element (5) is a single-end-face mechanical seal or a double-end-face mechanical seal or a packing seal or a framework oil seal.
5. A combination support and positioning double-suction twin-screw pump according to claim 3, wherein: two pinion gears (19) are arranged in the gear box (16), one of the pinion gears (19) is fixedly arranged on the driving screw rod (11), the other pinion gear (19) is fixedly arranged on the driven screw rod (12), and the two pinion gears (19) are meshed with each other.
6. The combination support and positioning double-suction twin-screw pump according to claim 5, wherein: one end of the driving screw rod (11) provided with the auxiliary gear (19) penetrates through the gear box (16).
7. The combination support and positioning double-suction twin-screw pump according to claim 1, wherein: the axial positioning piece (18) is an angular contact ball bearing, a deep groove ball bearing or a four-point contact ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121721100.5U CN215333400U (en) | 2021-07-27 | 2021-07-27 | Combined supporting and positioning double-suction double-screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121721100.5U CN215333400U (en) | 2021-07-27 | 2021-07-27 | Combined supporting and positioning double-suction double-screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215333400U true CN215333400U (en) | 2021-12-28 |
Family
ID=79573059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121721100.5U Active CN215333400U (en) | 2021-07-27 | 2021-07-27 | Combined supporting and positioning double-suction double-screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215333400U (en) |
-
2021
- 2021-07-27 CN CN202121721100.5U patent/CN215333400U/en active Active
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