CN217632903U - Screw pump easy to maintain - Google Patents

Abstract

The utility model discloses a screw pump of easy maintenance, including the pump body, feeding chamber and the drive arrangement who connects gradually, wherein the pump body includes stator and rotor, drive arrangement includes the output shaft and supports the bearing frame of output shaft, the output shaft is through setting up the jackshaft of feeding chamber with the rotor is connected, the jackshaft has helical blade, the feeding chamber court the confession has been seted up to the one end of bearing frame the opening that the jackshaft passes through, the first end cover of opening part fixedly connected with, the other end of first end cover is connected the bearing frame, first end cover is opened and is equipped with the confession the first through-hole that the jackshaft passes through. The mounting positions of the first end cover and the second end cover which are connected with each other are allowed to be staggered, so that the feeding chamber can be provided with an opening as large as possible, the outer diameter of the spiral blade is allowed to be close to the inner wall of the feeding chamber as much as possible, and then the accumulation of materials in the feeding chamber is reduced. The bearing seat can correspondingly reduce the volume, reduce the weight and facilitate the maintenance and the installation.

Description

Screw pump easy to maintain

Technical Field

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

Background

A screw pump is one of positive displacement rotary pumps that relies on the change in volume of a sealed chamber formed by a screw (rotor) and a liner (stator) to draw in and discharge liquid. Generally comprises a pump body, a feeding chamber and a driving device which are connected in sequence,

in order to facilitate assembly and maintain the feeding effect of the helical blades, the diameter of the helical blades is close to the inner wall of the feeding chamber, so that a hole with a diameter larger than that of the helical blades needs to be formed in the feeding chamber, and the hole is arranged at one axial end, namely one end close to a pump head or one end close to a driving device according to the installation direction of the intermediate shaft. Taking the example of the end of the drive means, the drive means would require a larger housing to interface with the feed chamber due to the presence of the aperture. Resulting in a larger volume and a heavier weight.

SUMMERY OF THE UTILITY MODEL

The application provides a screw pump reduces that the material in the feed chamber is piled up and easily dismantles the maintenance.

The application provides a screw pump of easy maintenance, including the pump body, feeding chamber and the drive arrangement who connects gradually, wherein the pump body includes stator and rotor, drive arrangement includes output shaft and support the bearing frame of output shaft, the output shaft is through setting up the jackshaft of feeding chamber with the rotor is connected, the jackshaft has helical blade, the feeding chamber court the confession has been seted up to the one end of bearing frame the opening that the jackshaft passes through, the first end cover of opening part fixedly connected with, the other end of first end cover is connected the bearing frame, first end cover opens and is equipped with the confession the first through-hole that the jackshaft passes through.

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 may be combined individually for the above general solution or between several alternatives without technical or logical contradictions.

Optionally, the first end cover is bolted to the bearing seat.

Optionally, the first end cap has a first internal plug portion extending axially along the output shaft and engaging an internal wall of the opening.

Optionally, a groove for installing a sealing ring is arranged in a region where the first inner plug part is matched with the inner wall of the opening.

Optionally, a second end cover is disposed at one end of the bearing seat facing the pump body, two axial ends of the second end cover are respectively clamped by the first end cover and the bearing seat, and a second through hole matched with the output shaft is formed in the second end cover.

Optionally, the second end cap has a second internal plug portion extending axially along the output shaft and interfitting with an internal wall of the first through bore.

Optionally, a gap for installing a sealing filler is arranged between the second end cover and the output shaft, the gap is closed towards one end of the pump body, the other end of the pump body is open, and a gland for tightly abutting against the sealing filler is connected to the open end of the second end cover through a bolt.

Optionally, the end cap is clearance fitted with the bearing seat.

Optionally, the first through hole is chamfered towards one side of the pump body.

The utility model provides an interconnect through first end cover between feeding chamber and the bearing frame of the screw pump of easy maintenance, first end cover is as the connecting piece, the mounted position of allowing two rather than linking to each other misplaces each other for volume size between them satisfies corresponding part installation can, for example the feeding chamber can set up the opening as far as possible and allow helical blade's external diameter to press close to each other with the feeding chamber inner wall as far as possible, and then reduce the piling up of material in the feeding chamber. The bearing seat can correspondingly reduce the volume, reduce the weight and facilitate the maintenance and the installation.

Drawings

FIG. 1 is a schematic view of an embodiment of an easy-to-service progressive cavity pump of the present application;

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

FIG. 3 is an assembled view of the second end cap of FIG. 2 with the output shaft;

fig. 4 is an enlarged view of the portion B of fig. 2.

The reference numerals in the figures are illustrated as follows:

100. a feeding chamber; 110. an intermediate shaft; 120. a helical blade; 130. an opening; 140. a first mounting portion;

200. a pump body; 210. a stator; 220. a rotor;

300. a drive device; 310. an output shaft; 330. a bearing seat; 340. a second mounting portion;

340. sealing and filling; 350. a gland;

400. a first end cap; 410. a first inner plug portion; 420. a seal ring; 430. a groove; 440. a first through hole;

500. a second end cap; 510. a second inner plug portion; 520. a gap; 530. positioning a block; 540. a second via.

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 a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to 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 implying any particular order or number of technical features indicated. 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 an easy-to-maintain screw pump, which includes a pump body 200, a feeding chamber 100, and a driving device 300, which are connected in sequence, wherein the pump body 200 includes a stator 210 and a rotor 220, the driving device 300 includes an output shaft 310 and a bearing seat 330 for supporting the output shaft 310, the output shaft 310 is connected to the rotor 220 through an intermediate shaft 110 disposed in the feeding chamber 100, and the outer periphery of the intermediate shaft 110 has a spiral blade 120. In operation, the intermediate shaft 110 rotates to drive the helical blade 120 to push the material in the feeding chamber 100 toward the pump body 200.

The end of the feeding chamber 100 facing the bearing seat 330 is provided with an opening 130 for the intermediate shaft 110 to pass through, and of course, the opening 130 also allows the helical blade 120 to pass through, so that when being installed, the feeding chamber 100 can be smoothly sleeved on the outer periphery of the intermediate shaft 110, and can be smoothly connected with the bearing seat 330. And a first end cap 400 is fixedly connected to the opening 130, and the other end of the first end cap 400 is connected to the bearing housing 330. The first end cap 400 and the two connected thereto have a first mounting portion 140 and a second mounting portion 340, respectively, wherein the first end cap 400 is bolted to the feeding chamber 100 and the bearing housing 330 at corresponding mounting portions, and the mounting portions are allowed to be misaligned with each other, i.e., the two connecting portions are not in a radial direction.

In this embodiment, the first mounting portion 140 is located radially outward relative to the second mounting portion 340, which allows the bearing housing 330 to be smaller in size, lighter in weight, and easier to maintain and install than the conventional method in which the feeding chamber and the bearing housing are directly butted against each other. On the other hand, the inner diameter of the opening 130 is as close as possible to the inner wall of the feeding chamber 100 (the inner part of the feeding chamber where the intermediate shaft 110 is located), so that the outer diameter of the helical blade 120 is as close as possible to the inner wall of the feeding chamber 100, thereby reducing the accumulation of materials and improving the feeding efficiency.

In one embodiment, the first end cap 400 has a first internal plug portion 410 extending axially along the output shaft and engaging the inner wall of the opening. The radial outer periphery of the first plug portion 410 and the inner wall of the opening are engaged with each other to provide a positioning function during installation, so that the first end cap 400 and the feeding chamber 100 correspond to each other in the first installation portion. And a groove 430 for installing a sealing ring 420 (e.g., an O-ring) is provided on the outer circumferential surface of the first inner plug portion 410, preventing leakage of material from an assembly gap, and improving sealability.

Of course, the first end cap 400 is provided with a first through hole 440 for the intermediate shaft 110 to pass through, in an embodiment, one end of the bearing seat 330 facing the pump body 200 is provided with a second end cap 500, two axial ends of the second end cap 500 are respectively clamped by the first end cap 400 and the bearing seat 330, and the second end cap 500 is provided with a second through hole 540 matching with the output shaft 310. The second end cap 500 can block the first through hole 440 to prevent the material from flowing into the bearing housing 330. Wherein the first end cap 400 and the bearing housing 330 are clearance fit as shown in fig. 4, and the bolted connection ensures that the second end cap 500 is clamped.

In one embodiment, the second end cap 500 has a second internal plug portion 510 extending axially along the output shaft and interfitting with the inner wall of the first through bore 440. The radial outer peripheral surface of second inner plug portion 510 and the inner wall of first through-hole 440 are laminated each other, play radial positioning and both tight fits and improve the leakproofness during the installation. The second end cap 500 is further provided with a radially protruding positioning block 530, and two axial ends of the positioning block 530 are abutted by the first end cap 400 and the bearing seat 330.

In one embodiment, a gap 520 for installing the sealing filler 340 is disposed between the second end cover 500 and the output shaft 310, the gap 520 is closed toward one end of the pump body 200, and the other end is open, and a gland 350 for abutting against the sealing filler 340 is bolted to the open end of the second end cover 500.

In another embodiment, first through hole 440 is chamfered toward one side of pump body 200 so that material cannot accumulate at the chamfer.

The first end cover of the screw pump easy to maintain allows the mounting positions of the feeding chamber and the bearing seat connected with the first end cover to be staggered with each other as a transition connector, so that the volume of the first end cover and the volume of the bearing seat are equal to that of the corresponding parts, for example, the feeding chamber can be provided with an opening as large as possible to allow the outer diameter of the spiral blade to be close to the inner wall of the feeding chamber as much as possible, and then the accumulation of materials in the feeding chamber is reduced. The bearing seat can correspondingly reduce the volume, reduce the weight and facilitate the maintenance and the installation.

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 of easy maintenance, including the pump body, feeding chamber and the drive arrangement who connects gradually, wherein the pump body includes stator and rotor, drive arrangement includes the output shaft and supports the bearing frame of output shaft, the output shaft is through setting up the jackshaft of feeding chamber with the rotor is connected, the jackshaft has helical blade, a serial communication port, the feeding chamber court the confession has been seted up to the one end of bearing frame the opening that the jackshaft passes through, opening part fixedly connected with first end cover, the other end of first end cover is connected the bearing frame, first end cover is opened and is equipped with the confession the first through-hole that the jackshaft passes through.

2. The easy-to-service screw pump of claim 1, wherein the first end cap is bolted to the bearing housing.

3. The easy-to-service screw pump of claim 1, wherein the first end cap has a first internal plug portion extending axially along the output shaft and engaging an internal wall of the opening.

4. A screw pump according to claim 3, in which the region of the first plug portion which engages the internal wall of the opening is provided with a groove in which a sealing ring is seated.

5. The screw pump of claim 1, wherein the bearing seat is provided with a second end cap at an end facing the pump body, two axial ends of the second end cap are respectively clamped by the first end cap and the bearing seat, and the second end cap is provided with a second through hole matched with the output shaft.

6. The easy-to-service screw pump of claim 5, wherein the second end cap has a second internal plug portion extending axially along the output shaft and interfitting with an internal wall of the first through bore.

7. The easy-to-maintain screw pump according to claim 5, wherein a gap for installing a sealing packing is provided between the second end cap and the output shaft, the gap is closed toward one end of the pump body, the other end is open, and a gland for abutting against the sealing packing is bolted to the open end of the second end cap.

8. A progressive cavity pump according to claim 5, wherein the first end cap is a clearance fit with the bearing housing.

9. A screw pump for easy servicing according to claim 1, wherein the first through hole is chamfered towards the side of the pump body.

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