CN217632901U - Screw pump convenient to disassemble and assemble - Google Patents

Abstract

The utility model discloses a screw pump of convenient dismantlement and installation, 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 provides the bearing frame that supports for the output shaft, the bearing frame has first cavity and the second cavity of arranging along the axial, be provided with axle sealing member and bearing in first cavity and the second cavity respectively, be provided with the jackshaft of connecting output shaft and rotor in the feeding chamber, the output shaft is including the first section and the second section that cup joint each other, wherein first section with the cooperation of axle sealing member, the second section with the bearing cooperation. During disassembly, the first section and the shaft seal can be maintained and replaced after being exposed; and the second section, the bearing seat and the driving device are integrally and synchronously disassembled, the matching relation is unchanged, and the disassembly and the subsequent installation processes are more convenient than the prior art.

Description

Screw pump convenient to disassemble and assemble

Technical Field

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

Background

A screw pump is one of positive displacement rotor 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.

The rotor and the stator form a pump body, the feeding chamber and the driving device are sequentially connected with the pump body, the driving device comprises a power device for providing power and an output shaft connected with the power device, and the output shaft is directly or indirectly connected with the rotor. The periphery of the output shaft is provided with a shaft sealing element, the shaft sealing element is easy to wear or the output shaft is worn and needs to be replaced under long-time operation, and the connection with a power device and the matching with a bearing need to be released when the output shaft is detached in the prior art. The reassembly difficulty is large and the coaxiality is susceptible.

SUMMERY OF THE UTILITY MODEL

The application provides a screw pump of convenient dismantlement and installation, it is more convenient to the maintenance of output shaft.

The application provides a screw pump of convenient dismantlement and installation, 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 provides the bearing frame of support for the output shaft, the bearing frame has first cavity and the second cavity of arranging along the axial, be provided with axle seal spare and bearing in first cavity and the second cavity respectively, be provided with the jackshaft of connecting output shaft and rotor in the feeding chamber, the output shaft is including the first section and the second section that cup joint each other, wherein first section with the axle seal spare cooperation, the second section with the bearing cooperation.

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 first chamber is in communication with the outside, and the first and second sections are held stationary by a connecting means, the connecting means being located in the first chamber.

Optionally, the connecting device includes:

the first mounting hole is formed in the first section in the radial direction;

the second mounting hole is formed in the second section in the radial direction and is matched with the first mounting hole;

the bolt penetrates through the first mounting hole and the second mounting hole, and the part of the bolt exposed at the first section or the second section is locked and kept relatively fixed with the output shaft through a clamp spring.

Optionally, the shaft seal comprises:

the end cover is clamped and fixed by the feeding chamber and the bearing seat, and is partially positioned in the first cavity;

a seal packing disposed between the end cap and the first segment;

the gland is located in the first cavity and the first section of periphery is sleeved with the gland in a sliding mode, and the gland is connected with the end cover through a bolt to clamp the sealing filler.

Optionally, the end cover is radially provided with a cooling inlet and a cooling outlet for the cooling liquid to enter and flow out.

Optionally, the cooling outlet and the cooling inlet are arranged oppositely.

Optionally, the first section is sleeved with a water retaining ring for preventing liquid from entering the second chamber.

Optionally, the second section is provided with a step abutting against one axial end of the bearing, and the other end of the bearing abuts against a bearing snap spring sleeved on the second section.

Optionally, the driving device includes a motor for providing power, and the motor is connected to the second section through a coupling.

The utility model provides an output shaft in convenient screw pump of dismantling and installing is two segmentations, appears wearing and tearing easily with shaft seal complex first section, and when maintaining the change, only need two first sections dismantle maintain can, the second section still keeps being connected with power device to do not influence the axiality, and can not have when reassembling the cooperation problem with the bearing.

Drawings

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

FIG. 2 is a view of a portion of the structure of FIG. 1;

FIG. 3 is a structural view of FIG. 2 with the first and second sections separated;

FIG. 4 is an enlarged view of portion A of FIG. 1;

fig. 5 is an enlarged view of portion B of fig. 3.

The reference numbers in the figures are as follows:

100. a feeding chamber; 110. an intermediate shaft;

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

300. a drive device; 310. an output shaft; 311. a first stage; 312. a second stage; 313. a step; 320. a motor; 330. a bearing seat; 331. a first chamber; 332. a second chamber;

340. a shaft seal; 341. an end cap; 342. sealing the filler; 343. a gland; 345. a cooling inlet; 346. a cooling outlet;

350. a bearing;

361. a first mounting hole; 362. a second mounting hole; 363. a bolt; 364. a clamp spring;

370. a water retaining ring; 380. a bearing snap spring; 390. a coupler is provided.

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, 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 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 5, the present application provides a screw pump convenient to disassemble and assemble, including a pump body 200, a feeding chamber 100 and a driving device 300 connected in sequence, in which 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 bearing seat 330 has a first chamber 331 and a second chamber 332 arranged along an axial direction (the axial direction of the output shaft), a shaft sealing member 340 and a bearing 350 are respectively disposed in the first chamber 331 and the second chamber 332, an intermediate shaft 110 for connecting the output shaft 310 and the rotor 220 is disposed in the feeding chamber 100, and the output shaft 310 includes a first section 311 and a second section 312 sleeved with each other.

Wherein the drive device 300 includes a powered motor 320, a first section 311 engaged with a shaft seal 340 and interfacing with the intermediate shaft 110, and a second section 312 engaged with a bearing 350 and coupled to the motor 320 via a coupling 390. During continuous operation, one or both of the first section 311 and the shaft seal 340 may be worn and need to be maintained or replaced, and then only the first section 311 and the second section 312 need to be disengaged, and after the bearing housing 330 is disconnected from the feederhouse 100, the second section 312 is synchronously moved by moving the bearing housing 330 as a whole, and the first section 311 and the shaft seal 340 are exposed, so that corresponding replacement and maintenance can be performed. And the matching relation among the second section 312, the bearing 350 and the bearing seat 330 is unchanged, so that the drive device 300 does not need to be reassembled, and the disassembly and the subsequent reassembly are convenient.

The first chamber 331 is in communication with the outside, and the size of the first chamber 331 may be adapted to be inserted into a hand or a tool for the size of the screw pump as a whole. The first section 311 and the second section 312 are held in place by a connection means, both sections being shafts, which may be keyed or otherwise configured. The connection means is located in the first chamber 331 and allows for removal by a tool, which disengages the first section 311 from the second section 312, facilitating subsequent disengagement of the bearing housing 330 with the second section 312 from the first section 311.

In one embodiment, the connecting device includes a first mounting hole 361 radially formed on the first section 311 along the output shaft, a second mounting hole 362 radially formed on the second section 312, and a plug 363, wherein the second mounting hole 362 is adapted to the first mounting hole 361, so that the plug 363 can pass through the first mounting hole 361 and the second mounting hole 362, thereby keeping the first section 311 and the second section 312 fixed in the axial direction and the circumferential direction. And the through direction of the first chamber 331 is the same as the radial direction of the output shaft, so that the plug 363 can be conveniently and directly plugged. The portion of the latch 363 exposed at the first section 311 or the second section 312 is locked and kept fixed relative to the output shaft 310 by the clamp spring 364.

The shaft seal 340 of this embodiment includes an end cap 341, a sealing packing 342, and a gland 343, wherein the end cap 341 is held by the feeding chamber 100 and the bearing seat 330 and is partially located in the first chamber 331, the end cap 341 partially extends into the first chamber 331 and has a gap with the first segment 311 for accommodating the sealing packing 342, and the sealing packing 342 is disposed in the gap; the gland 343 is located in the first chamber 331 and slidably fits around the periphery of the first section, the gland 343 is connected to the end cap 341 by a bolt, the bolt is located in the first chamber 331 and the gland 343 is driven to clamp the packing 342 by tightening a tool.

In an embodiment, the end cap 341 is radially provided with a cooling inlet 345 and a cooling outlet 346 for the cooling liquid to enter and exit, and a cooling channel is correspondingly provided to connect the cooling inlet 345 and the cooling outlet 346, the cooling channel is used for offsetting heat generated by friction between the sealing packing 342 and the first segment 311, wherein the cooling outlet 346 and the cooling inlet 345 are oppositely arranged.

The first and second chambers 331 and 332 of the bearing housing 330 are in communication, wherein the first section 311 is fitted with a water dam 370 that blocks liquid from entering the second chamber 332. Preventing the bearing 350 from rusting or affecting the lubrication between the bearing 350 and the second section 312.

The second section 312 has a step 313 disposed at one axial end of the bearing, and the other end of the bearing 350 abuts against a bearing snap spring 380 disposed on the second section 312.

The following describes the sequence of removal and installation of the seal filler 342 and the first segment 311 for maintenance:

disassembling:

s1: the clamp spring 364 is removed by a tool extending into the first chamber 331, and the latch 363 is withdrawn;

s2: loosening the fasteners between the feed chamber 100 and the bearing support 330;

s3: moving the bearing holder 330 axially toward the motor 320 to disengage the first section 311 from the second section 312 until completely disengaged;

s4: the shaft seal 340 is removed and the seal packing 342 or first section 311 is serviced or replaced.

The mounting sequence is opposite to the dismounting sequence.

In the step S3, the matching relationship among the bearing, the second section, the bearing seat and the driving device is not changed, the first section 311 is connected with the intermediate shaft 110, and thus the first section 311 is separated from the second section 312 in the axial direction, and the shaft sealing member 340 is matched with the first section 311, so that the first section is separated from the bearing seat 330.

The output shaft of the screw pump convenient to disassemble and assemble is divided into a first section and a second section, and the first section and a shaft sealing element can be maintained and replaced after being exposed during disassembly; and the second section, the bearing seat and the driving device are synchronously disassembled, the matching relation is unchanged, and the disassembling and subsequent assembling processes are more convenient than the prior assembling process.

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, which falls within the scope of protection of the present application.

Claims (9)

1. Screw pump of convenient dismantlement and installation, 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 provides the bearing frame of support for the output shaft, the bearing frame has first cavity and the second cavity of arranging along the axial, be provided with axle sealing member and bearing in first cavity and the second cavity respectively, be provided with the jackshaft of connecting output shaft and rotor in the feeding chamber, its characterized in that, the output shaft is including the first section and the second section that cup joint each other, wherein first section with the cooperation of axle sealing member, the second section with the bearing cooperation.

2. Screw pump according to claim 1, wherein the first chamber is in communication with the outside, the first and second sections being held fixed by connection means between them, the connection means being located in the first chamber.

3. A screw pump according to claim 2, wherein the attachment means comprises:

the first mounting hole is formed in the first section in the radial direction;

the second mounting hole is formed in the second section in the radial direction and is matched with the first mounting hole;

the bolt penetrates through the first mounting hole and the second mounting hole, and the part of the bolt exposed at the first section or the second section is locked and kept relatively fixed with the output shaft through a clamp spring.

4. The screw pump of claim 1, wherein the shaft seal comprises:

the end cover is clamped and fixed by the feeding chamber and the bearing seat, and is partially positioned in the first cavity;

a seal packing disposed between the end cap and the first segment;

the gland is located in the first cavity and the sliding sleeve is arranged on the periphery of the first section, and the gland is connected with the end cover through a bolt to clamp the sealing packing.

5. The screw pump of claim 4, wherein the end cap has radially disposed cooling inlets and outlets for the ingress and egress of cooling fluid.

6. The screw pump of claim 5, wherein the cooling outlet and the cooling inlet are arranged in opposing relation.

7. A pump according to claim 1, wherein the first section incorporates a water retaining ring to block liquid from entering the second chamber.

8. The screw pump of claim 1, wherein the second section is provided with a step abutting against an axial end of the bearing, and the other end of the bearing abuts against a bearing snap spring sleeved on the second section.

9. A pump according to claim 1, wherein the drive means comprises a powered motor coupled to the second section by a coupling.

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