CN211852150U

CN211852150U - Double-screw pump structure

Info

Publication number: CN211852150U
Application number: CN202020326872.8U
Authority: CN
Inventors: 王旭; 余义全; 齐晓燕; 米素英; 栗斌
Original assignee: Hebei Hengsheng Pumps Co ltd
Current assignee: Hebei Hengsheng Pumps Co ltd
Priority date: 2020-03-16
Filing date: 2020-03-16
Publication date: 2020-11-03
Anticipated expiration: 2030-03-16

Abstract

The utility model provides a double-screw pump structure belongs to screw pump technical field, include: the pump comprises a pump body, a lining, a pump core assembly and a first bearing seat. The bush is arranged in the pump body. The pump core assembly is installed and connected in the lining. The first bearing seat is detachably connected to the pump body and the pump core assembly. The utility model provides a twin-screw pump structure when needs maintain the twin-screw pump, can take out the pump core assembly together with the bush from the pump body after dismantling down primary shaft bearing, when having shortened the maintenance to the maintenance is more simple and convenient, has reduced the risk that the user shut down the production and shut down.

Description

Double-screw pump structure

Technical Field

The utility model belongs to the technical field of the screw pump, more specifically say, relate to two screw pump structure.

Background

When the flow rate and pressure of the conventional twin-screw pump are not enough to meet the use requirements, or the screw pump needs to replace components, a customer needs to prepare related tools and parts in advance, and a manufacturer needs to send an experienced engineer to the field to assist in maintenance. When the site does not have the maintenance condition, the screw pump needs to be detached from the pipeline and returned to the factory for maintenance or replaced by a spare pump. The existing screw pump cannot realize quick maintenance, the consumed maintenance time is long, the requirement on the on-site maintenance environment is strict, and the risk of production halt and shutdown is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a twin-screw pump structure aims at solving the unable quick maintenance that realizes, and the maintenance duration of spending is longer to it is harsher to the maintenance environment requirement on scene, has the problem of the risk of shut down.

In order to achieve the above object, the utility model adopts the following technical scheme: providing a twin screw pump arrangement comprising:

a pump body;

a bushing disposed within the pump body;

the pump core assembly is installed and connected in the lining; and

and the first bearing seat is detachably connected with the pump body and the pump core assembly.

As another embodiment of the present application, one end of the bushing is a driving end, and the other end is a non-driving end; the outer diameter of the driving end is smaller than that of the non-driving end.

As another embodiment of the present application, further comprises a gearbox cover; the gear box cover is connected to one side, away from the pump body, of the first bearing seat.

As another embodiment of the present application, a second bearing housing is further included, the second bearing housing being coupled to the drive end.

As another embodiment of the present application, an outer diameter of the second bearing housing is smaller than an outer diameter of the bushing.

As another embodiment of the present application, the bearing further comprises a sealing end cover, and the sealing end cover is fixedly connected with the second bearing seat.

As another embodiment of the present application, the bushing is provided with a plurality of protrusions on an outer circumference thereof.

As another embodiment of the present application, the outer diameters of the plurality of protrusions sequentially increase in a direction from the driving end to the non-driving end.

As another embodiment of the application, a plurality of the convex parts are all sleeved with sealing rings.

As another embodiment of the present application, the pump cartridge assembly includes:

a synchronizing gear provided inside the bushing; and a gear box cover is arranged on the outer side of one end of the synchronous gear, and the gear box cover is fixedly connected with the first bearing seat.

The utility model provides a two screw pump structure's beneficial effect lies in: compared with the prior art, the utility model discloses the bush is established in the pump body in the twin-screw pump structure. And a pump core assembly is installed and connected in the lining. In order to ensure the stability of the pump core assembly, the first bearing seat is detachably connected to the pump body and the pump core assembly. When the double-screw pump needs to be maintained, the pump core assembly and the bushing can be pulled out from the pump body after the first bearing seat is disassembled, the maintenance time is shortened, the maintenance is simpler and more convenient, and the risk of shutdown and shutdown of a user is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a twin-screw pump structure provided by an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural diagram of a synchronizing gear according to an embodiment of the present invention.

In the figure: 1. a pump body; 2. a bushing; 3. a pump core assembly; 301. a gearbox cover; 302. a synchronizing gear; 303. a driving screw; 304. a driven screw; 305. a bearing; 4. a first bearing housing; 5. a second bearing housing; 6. sealing the end cap; 7. a raised portion.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and fig. 2 together, the structure of the twin-screw pump according to the present invention will now be described. A twin screw pump structure comprising: the pump body 1, the bush 2, the pump core assembly 3 and the first bearing seat 4. The bush 2 is provided inside the pump body 1. The pump core assembly 3 is installed and connected in the lining 2. The first bearing seat 4 is detachably connected with the pump body 1 and the pump core assembly 3.

The utility model provides a two screw pump structure's beneficial effect lies in: compared with the prior art, the utility model discloses bush 2 is established in the pump body 1 among the twin-screw pump structure. The pump core assembly 3 is installed and connected on the lining 2. In order to ensure the stability of the pump core assembly 3, the first bearing seat 4 is detachably connected to the pump body 1 and the pump core assembly 3. When the double-screw pump needs to be maintained, the pump core assembly 3 and the lining 2 can be drawn out from the pump body 1 after the first bearing seat 4 is disassembled, the maintenance time is shortened, the maintenance is simpler and more convenient, and the risk of shutdown and shutdown of a user is reduced.

As a specific embodiment of the twin-screw pump structure provided by the present invention, please refer to fig. 1, one end of the bushing 2 is a driving end, and the other end is a non-driving end; the outer diameter of the driving end is smaller than that of the non-driving end. The driving end is provided with an input shaft, and the input shaft is generally in transmission connection with a reduction gearbox and other devices. When the twin-screw pump fails, the pump core assembly 3 and the bush 2 are difficult to take out from the driving end, so that the outer diameter of the bush 2 close to the driving end is smaller than that of the non-driving end, and maintenance is facilitated. Because the pump core assembly 3 is connected and fixed on the lining 2, the pump core assembly 3 and the lining 2 can be drawn out from a non-driving end, thereby simplifying the maintenance steps and shortening the maintenance time. The driving end is the end extending to the outside of the end cap 6 with the driving screw 303.

As a specific embodiment of the twin-screw pump structure provided by the present invention, please refer to fig. 1, further comprising a gearbox cover 301; the gearbox cover 301 is connected to the side of the first bearing block 4 facing away from the pump body 1. The gearbox cover 301 is located at the non-drive end. One side of the first bearing seat 4 is fixedly connected with the gearbox cover 301, and the other side of the first bearing seat 4 is respectively connected with the pump body 1 and the pump core assembly 3. The gearbox cover 301 is provided with a threaded counter bore for connecting with the first bearing block 4.

As a specific implementation manner of the twin-screw pump structure provided by the present invention, please refer to fig. 1, further comprising a second bearing seat 5, wherein the second bearing seat 5 is connected to the driving end. In this application, it is necessary to draw the pump core assembly 3 together with the liner 2 from the non-drive end, so that the first bearing block 4 can be attached to the pump body 1 near the non-drive end. The function of the first bearing seat 4 is to position the liner 2 together with the pump core assembly 3 on the pump body 1, ensuring stable position during the movement of the pump core assembly 3. In order to be able to smoothly extract the bush 2 together with the pump core assembly 3 from the non-drive end, the second bearing seat 5 is fixed to the bush 2, and the outer diameter of the second bearing seat 5 is smaller than the inner diameter of the pump body 1. The existing bearing seats are fixed at two ends of the pump body 1, when the bearing seats on two sides need to be detached, and the internal components need to be detached according to a certain sequence, so that the double-screw pump is limited by the field, the maintenance difficulty is high, and the maintenance time is long. Second bearing frame 5 in this application can be taken out from the pump body 1 along with bush 2, has avoided the limited influence in place, has improved maintenance efficiency.

As a specific embodiment of the twin-screw pump structure provided in the present invention, please refer to fig. 1, the outer diameter of the second bearing seat 5 is smaller than the outer diameter of the bushing 2. In order to enable the second bearing block 5 to be extracted from the pump body 1 together with the bush 2, it is ensured that the maximum diameter of the outer edge of the second bearing block 5 is smaller than the diameter of the outer edge of the bush 2. The first bearing housing 4 and the second bearing housing 5 are each provided with an annular groove, and a plurality of ribs are fixed for structural stability in each of the circumferential directions of the first bearing housing 4 and the second bearing housing 5. A plurality of positioning holes for connecting and fixing the pump body 1 are formed along the circumferential direction of the first bearing block 4. Through holes for connecting and fixing the bushing 2 are uniformly formed along the circumferential direction of the second bearing seat 5. The first bearing seat 4 and the second bearing seat 5 are connected to the corresponding pump body 1 and the corresponding bush 2 through studs and nuts.

As a specific implementation manner of the twin-screw pump structure provided by the present invention, please refer to fig. 1, further comprising a sealing end cover 6, wherein the sealing end cover 6 is fixedly connected to the second bearing seat 5. The seal end cover 6 and the gear box cover 301 are distributed at two ends of the pump core assembly 3. One end of the second bearing seat 5 is connected to the bushing 2, and the other end is connected and fixed to the sealing end cover 6. The outer diameter of the seal cover 6 is smaller than the outer diameter of the second bearing housing 5, so that the seal cover 6 can be withdrawn from the pump body 1 following the second bearing housing 5.

As a specific embodiment of the twin-screw pump structure provided in the present invention, please refer to fig. 1, a plurality of protrusions 7 are disposed along the periphery of the bushing 2. The function of the bosses 7 is to reduce the overall weight of the liner 2 and to ensure the stability of the connection between the pump body 1 and the pump core assembly 3. The bulge part 7 is abutted against the inner wall of the pump body 1 and plays a supporting role in the movement process of the double-screw pump.

As a specific embodiment of the twin-screw pump structure provided by the present invention, please refer to fig. 1, the outer diameters of the plurality of protrusions 7 sequentially increase from the driving end to the non-driving end. Taking four convex portions 7 as an example, in order to ensure good sealing performance, two convex portions 7 are distributed at two ends of the bushing 2 and are hermetically connected with the inner walls of two sides of the pump body 1. Because the pump core assembly 3 rotates relative to the pump body 1, in order to ensure the structural stability of the bush 2 and improve the bearing capacity of the bush 2, two ends close to the bush 2 are respectively provided with a convex part 7. The outer edges of the plurality of convex parts 7 are gradually increased in the direction from the driving end to the non-driving end, so that the lining 2 can be smoothly drawn out from the pump body 1.

As a specific embodiment of the twin-screw pump structure provided by the present invention, please refer to fig. 1, a plurality of protrusions 7 are all sleeved with a sealing ring. Because the end cover at the drive end of bush 2 in this application is connected on bush 2 rather than the pump body 1, in order to guarantee the sealing performance between pump body 1 and bush 2, all establish seal ring on a plurality of bellying 7, seal ring is used for the clearance between the sealed bush 2 and the pump body 1. An annular groove can be arranged on the outer edge of the bulge part 7, and the sealing washer is clamped on the annular groove. The sealing washer is a flexible and wear-resistant part and is abutted against the inner wall of the pump body 1.

As a specific embodiment of the twin-screw pump structure provided by the present invention, please refer to fig. 1 and 3, the pump core assembly 3 includes: synchronizing the gears 302. The synchronizing gear 302 is provided inside the liner 2. The outer side of one end of the synchronous gear 302 is provided with a gear box cover 301, and the gear box cover 301 is fixedly connected with the first bearing seat 4. In this application, the synchronizing gear 302302 includes a driving screw 303 and a driven screw 304 engaged with the driving screw 303, and bearings 305 are respectively sleeved on the driving screw 303 and the driven screw 304. The gear box cover 301 is located at the non-drive end and covers the outside of the drive screw 303 and the driven screw 304. The gear box cover 301 is fixedly connected to the first bearing seat 4, and the first bearing seat 4 is sleeved on a bearing 305 sleeved on the driving screw 303 and the driven screw 304. A sealing retainer ring is arranged between the gearbox cover 301 and the first bearing seat 4, so that the sealing performance of the gearbox cover 301 and the first bearing seat 4 is ensured.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. Twin-screw pump structure, its characterized in that includes:

a pump body;

a bushing disposed within the pump body;

the pump core assembly is installed and connected in the lining; and

2. The twin screw pump structure of claim 1, wherein said liner has a drive end at one end and a non-drive end at the other end; the outer diameter of the driving end is smaller than that of the non-driving end.

3. The twin screw pump structure of claim 1, further comprising a gearbox cover; the gear box cover is connected to one side, away from the pump body, of the first bearing seat.

4. The twin screw pump structure of claim 2, further comprising a second bearing block connected to said drive end.

5. The twin screw pump structure of claim 4, wherein the outer diameter of said second bearing blocks is less than the outer diameter of said bushings.

6. The twin screw pump structure defined in claim 4, further comprising a seal end cap, said seal end cap being fixedly connected to said second bearing housing.

7. The twin screw pump structure defined in claim 2, wherein said liner has a plurality of lobes on its periphery.

8. The twin screw pump structure defined in claim 7, wherein the outer diameter of a plurality of said lobes increases in order in the direction from said drive end to said non-drive end.

9. The twin screw pump construction of claim 7 wherein a plurality of said lobes are provided with a gasket.

10. The twin screw pump structure of claim 1, said pump core assembly comprising: