CN217632900U - Screw pump - Google Patents

Abstract

The utility model discloses a screw pump, which comprises a pump body, a driving device, a feeding chamber and a middle shaft, wherein the pump body comprises a stator and a rotor, and the stator is provided with a feeding hole and a discharging hole; said drive means having an output shaft, said feedwell including first and second portions adjacent said pump body and said drive means, respectively, said first and second portions being in abutting engagement with one another by a connecting means; the middle shaft is arranged in the feeding chamber, and two ends of the middle shaft are respectively connected with the rotor and the output shaft. The feeding chamber of the screw pump is of a two-section structure, so that when the connection part of the rotor or the rotor and the intermediate shaft is maintained and replaced, only the first part is disassembled to leave a space extending into the disassembly connection part, the whole feeding chamber does not need to be disassembled, and the maintenance efficiency is improved.

Description

Screw pump

Technical Field

The application relates to the technical field of screw pumps, in particular to a screw pump.

Background

A screw pump is a kind of positive displacement rotor pump, which sucks and discharges liquid by means of volume change of a sealed cavity formed by a screw (rotor) and a bushing (stator), the rotor is connected with a middle shaft to be connected with a driving device (motor) to realize self rotation, and the middle shaft is positioned in a feeding chamber, because the screw pump often conveys high-viscosity media (such as sludge with particles and the like). One or both of the rotor and stator may be replaced due to wear, for example, by removing the rotor, requiring the rotor to be disconnected from the intermediate shaft, but due to space constraints, requiring the entire feed chamber to be removed leaving the intermediate shaft completely exposed. The disassembly is troublesome due to the large volume of the feeding chamber.

SUMMERY OF THE UTILITY MODEL

The application provides a screw pump, it is more convenient to the maintenance of rotor.

The application provides a screw pump, includes:

the pump body comprises a stator and a rotor, and the stator is provided with a feeding hole and a discharging hole;

a drive device having an output shaft,

a feederhouse comprising first and second portions respectively adjacent the pump body and the drive means, the first and second portions being in abutting engagement with one another by a connecting means;

the intermediate shaft is arranged in the feeding chamber, and two ends of the intermediate shaft are respectively connected with the rotor and the output shaft.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, the two ends of the intermediate shaft in the axial direction of the intermediate shaft are respectively a first end part butted with the rotor and a second end part butted with the output shaft, and the first end part is arranged in the first part beyond the second part.

Optionally, the connecting device comprises a first lug arranged on the periphery of the first part, and a second lug arranged on the periphery of the second part and matched with the first lug, and the first lug and the second lug are fastened through bolts.

Optionally, one of the first part and the second part is provided with a groove, and the other part is provided with a boss matched with the groove.

Optionally, the first lug and the second lug are distributed around the periphery of the feeding chamber in a one-to-one correspondence manner; or the first lug and the second lug are continuous and annular.

Optionally, the first lug and the second lug are continuous rings, and a sealing ring is arranged between the first lug and the second lug.

Optionally, the second part is provided with a support foot adjacent to the second lug.

Optionally, the inner walls of the first and second portions are smoothly transitioned.

Optionally, two ends of the intermediate shaft are respectively connected with the rotor and the output shaft through universal joints, and the universal joint close to one side of the rotor is located in the first portion.

The utility model provides a screw pump when dismantling the maintenance rotor, dismantles the stator earlier, dismantles the first portion again for the connection position of jackshaft and rotor exposes, releases the maintenance space, need not to dismantle whole feeding chamber completely, convenient maintenance.

Drawings

FIG. 1 is a structural view of a screw pump according to an embodiment of the present application;

FIG. 2 is a partial view of the intermediate shaft portion of FIG. 1;

FIG. 3 is a fragmentary view of the first portion of FIG. 2, shown disassembled;

fig. 4 is an enlarged view of a portion a of fig. 2.

The reference numerals in the figures are illustrated as follows:

100. a feeding chamber; 110. an intermediate shaft; 111. a first end portion; 112. a second end portion; 130. a helical blade; 140. a universal joint; 150. a first portion; 151. a first lug; 152. a groove; 160. a second portion; 161. a second lug; 162. a boss; 163. supporting legs; 170. a seal ring; 180. a seal ring;

200. a pump body; 210. a stator; 211. a feed inlet; 212. a discharge port; 220. a rotor;

300. a drive device; 310. an output shaft; 320. a motor;

400. a base.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In this application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number, order of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Referring to fig. 1 to 4, the present application provides a screw pump, including a feeding chamber 100, a pump body 200, an intermediate shaft 110 and a driving device 300, wherein the pump body 200 includes a stator 210 and a rotor 220, and the stator 210 has a feeding port 211 and a discharging port 220. The driving device 300 has an output shaft 310 and a motor 320 directly or indirectly connected to the output shaft 310, and both ends of the intermediate shaft 110 are respectively connected to the rotor 220 and the output shaft 310, so as to transmit the output of the motor 320 to the rotor 220 for operation. The chamber 100 is mounted between the body 200 and the actuator 300 and includes a first portion 150 adjacent the body 200 and a second portion 160 adjacent the actuator 300, respectively, which are connected to each other by a connecting means and are hollow to allow material to enter the inlet 211.

The screw pump of this embodiment further includes a base 400 for fixing the pump body 200, the feeding chamber 100 and the driving device 300, and the specific installation sequence is as follows:

s1: mounting the driving device 300 on the base 400;

s2: docking the intermediate shaft 110 with the output shaft 310;

s3: the second part 160 is sleeved on the periphery of the intermediate shaft 110 and fixedly connected with the driving device 300 and the base 400;

s4: interfacing the rotor 220 and the intermediate shaft 110;

s5: first portion 150 is inserted through rotor 220 and mated with second portion 160, first portion 150 is fixedly coupled to base 400, and finally first portion 150 is also disposed about the outer periphery of intermediate shaft 110.

S6: the stator 210 is sleeved on the outer periphery of the rotor 220 and is butted with the first part 150, and the bottom of the stator 210 is fixedly connected with the base 400.

The disassembly sequence is opposite to the assembly sequence, so if the intermediate shaft needs to be maintained near one end of the pump body 200 or the rotor needs to be maintained, the stator is disassembled first, then the first part is disassembled, and the first part 150 is moved towards one end of the pump body, so that enough space is reserved for disassembling the joint of the rotor and the intermediate shaft. The whole feeding chamber does not need to be disassembled, and the disassembly is easier and quicker.

The two ends of the intermediate shaft 110 in the axial direction are respectively a first end 111 interfacing with the rotor 220 and a second end 112 interfacing with the output shaft 310, and the first end 111 is located in the first portion 150 beyond the second portion 160. The first end 111 can be fully exposed after removal of the first portion 150 and moving toward one end of the pump head, thereby leaving sufficient space for manual removal. Of course, in order to prevent the second part 160 from falling down after the first part 150 is detached, the second part 160 is provided with supporting feet 163, and the supporting feet 163 are fixedly installed on the base 400.

In one embodiment, the coupling means includes a first lug 151 disposed on the outer circumference of the first part 150, and a second lug 161 disposed on the outer circumference of the second part 160 to be engaged with the first lug 151, and the first lug 151 and the second lug 161 are fastened by a bolt. The lugs extend radially and are disposed outside the feeding chamber 100 to facilitate mounting and to maintain the inner wall of the feeding chamber flat (i.e., a smooth transition between the two inner walls) and to avoid interference with the helical blades 130 for some intermediate shafts 110 with helical blades 130. In conjunction with the foregoing, at least one support leg 163 is disposed adjacent to the second ledge 161.

To increase the speed of assembly of the two parts, one of the first and second parts 150, 160 is provided with a groove 152 and the other is provided with a boss 162 that mates with the groove 152. For assembly positioning, in the preferred embodiment, the bosses 162 and the grooves 152 are circumferentially continuous.

Compared with the traditional screw pump, the feeding chamber of the screw pump has a two-section structure, and the sealing performance of the two parts at the joint is required to be ensured. Thus, the first lug 150 and the second lug 160 are distributed around the periphery of the feeding chamber in a one-to-one correspondence; alternatively, the first lug 151 and the second lug 161 may be continuous rings. The multi-point connection is fixed, and the circumferential tightness of the two parts is kept. In addition to the two solutions, a sealing ring 170 (O-ring) is provided between the end faces of the two parts for sealing. Particularly, when the first lug 151 and the second lug 161 are continuous rings, a sealing ring 170 may be disposed between the two lugs to replace the sealing ring, or the sealing ring may be retained to further improve the sealing performance.

In another embodiment, the two ends of the intermediate shaft 110 are connected to the rotor 220 and the output shaft 310 respectively through universal joints 140, and the universal joint 140 on the side of the rotor 220 is located in the first portion 150. In combination with the above-described removal, after the first portion 150 is removed, the universal joint 140 at the first end 111 is exposed, and then the universal joint is removed for maintenance and replacement, or the rotor is maintained and replaced.

The utility model provides a feeding chamber of screw pump is two segmentation structures, then when the junction to the first end of rotor or jackshaft is maintained, is changed, only dismantle the first portion reserve stretch into dismantle the junction the space can, need not to dismantle whole feeding chamber, improve maintenance efficiency.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application.

Claims (9)

1. Screw pump, its characterized in that includes:

the pump body comprises a stator and a rotor, and the stator is provided with a feeding hole and a discharging hole;

a drive device having an output shaft,

a feeding chamber, said feeding chamber comprising first and second portions respectively adjacent said pump body and said drive means, said first and second portions being in abutting engagement with one another via a connecting means;

the intermediate shaft is arranged in the feeding chamber, and two ends of the intermediate shaft are respectively connected with the rotor and the output shaft.

2. Screw pump according to claim 1, wherein the intermediate shaft has at its axial ends a first end portion in abutment with the rotor and a second end portion in abutment with the output shaft, the first end portion being inside the first portion beyond the second portion.

3. A screw pump according to claim 1, wherein the connecting means comprises a first lug provided on the periphery of the first portion, and a second lug provided on the periphery of the second portion for engaging with the first lug, the first lug and the second lug being secured by a bolt.

4. A pump according to claim 3, wherein one of the first and second portions is provided with a groove and the other is provided with a boss which cooperates with the groove.

5. A pump according to claim 3, wherein the first and second lugs are distributed in a plurality and one-to-one correspondence around the periphery of the chamber; or the first lug and the second lug are continuous and annular.

6. A pump according to claim 5, wherein the first and second lugs are continuous annular, and a sealing ring is provided between the first and second lugs.

7. A pump according to claim 3, wherein the second portion is provided with a support foot adjacent the second lug.

8. Screw pump according to claim 1, wherein the inner walls of the first and second portions are smoothly transitioned.

9. Screw pump according to claim 1, wherein the intermediate shaft is connected at each end to the rotor and the output shaft by a universal joint, the universal joint on the side of the rotor being located in the first portion.

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