Mechanical sealing shaft sleeve for pump

Abstract

The utility model belongs to the technical field of mechanical sealing, and particularly relates to a mechanical sealing shaft sleeve for a pump, which comprises a rear shaft sleeve and a front shaft sleeve, the front shaft sleeve is connected to the front end of the rear shaft sleeve, and mounting mechanisms are connected to inner and outer ends of the rear shaft sleeve and the front shaft sleeve. According to the mechanical sealing shaft sleeve for the pump, when the sealing shaft sleeve is installed, a positioning rod slides into a positioning groove in the front side of a rear shaft sleeve, then the rear shaft sleeve and the front shaft sleeve are placed on the outer side of a pump shaft needing to be installed, and then a fixing bolt penetrates through a round hole and then is in threaded connection into a threaded groove, so that an I-shaped block is fixed into a fixing groove; at the moment, the rear shaft sleeve and the front shaft sleeve are relatively and fixedly connected to the outer end of the shaft, then the rear shaft sleeve and the front shaft sleeve are rotated to enable threaded holes in the rear shaft sleeve and the front shaft sleeve to rotate to connecting holes in the shaft, and bolts for fixing and sealing the shaft sleeve are connected into the threaded holes in a threaded mode and then connected into the connecting holes in the shaft; the sealing shaft sleeve is mounted on the outer side of the pump shaft.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical seal technical field, concretely is pump mechanical seal shaft sleeve. BACKGROUND

[0002] At present, the traditional centrifugal pump rotor has a shaft sleeve and a mechanical seal shaft sleeve, and is mounted on the pump shaft. During assembly, the spring compression amount of the mechanical seal is affected by the cumulative error of the parts processing, resulting in inaccurate pre-compression amount, deviating from the compression amount designed by the mechanical seal manufacturer, and further affecting the service life of the mechanical seal. Moreover, when adjusting the compression amount of the mechanical seal on both sides, multiple adjustments are required, which is inconvenient and inefficient. On the other hand, the mechanical seal shaft sleeve is difficult to disassemble, making maintenance and repair extremely inconvenient.

[0003] As disclosed in Chinese patent CN220302391U, the pump mechanical seal shaft sleeve and the pump mechanical seal device, the inner wall of the left end of the shaft sleeve body is provided with a sealing groove, the outer wall of the left end of the shaft sleeve body is provided with a step, the outer diameter of the outer wall of the left end of the shaft sleeve body is larger than the outer diameter of the outer wall of the right part of the shaft sleeve body, forming a step, the step is used for abutting against the mechanical seal, the inner wall of the right part of the shaft sleeve body is fixedly provided with an internal thread segment, a threaded hole is arranged on the right side of the internal thread segment, a screw is matched with the threaded hole to limit the rotation of the shaft sleeve body, the threaded holes are radially distributed, a dismounting groove is arranged on the end face of the right end of the shaft sleeve body, the dismounting groove is in a U shape, the opening of the dismounting groove faces right, and the dismounting groove is used for connecting with a wrench to drive the rotation of the shaft sleeve body, achieving the installation and dismounting of the shaft sleeve body, and improving the maintenance and repair efficiency of the pump.

[0004] However, when dismounting the shaft sleeve, it needs to be slid along the outer side of the shaft to the mounting position of the shaft for installation, resulting in that when dismounting the shaft sleeve, all the parts at one end of the shaft need to be dismounted, and then the shaft sleeve can be dismounted from the mounting position and pulled out along the outer side of the shaft, which is very inconvenient.

[0005] Therefore, it is urgent to provide a pump mechanical seal shaft sleeve which is convenient to dismount. TECHNICAL SOLUTION

[0006] The utility model discloses a pump mechanical seal shaft sleeve, which aims to solve the problems in the background art.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a pump mechanical seal shaft sleeve, comprising a rear shaft sleeve and a front shaft sleeve, the front shaft sleeve is connected to the front end of the rear shaft sleeve, and an installation mechanism is connected to the inner and outer ends of the rear shaft sleeve and the front shaft sleeve.

[0008] The installation mechanism comprises an I-shaped block connected to the outer ends of the rear shaft sleeve and the front shaft sleeve, fixed bolts connected to the front and rear ends inside the I-shaped block, a positioning rod connected to the inside of the rear shaft sleeve and the front shaft sleeve, and a sealing ring connected to the left and right ends of the inside of the rear shaft sleeve and the front shaft sleeve.

[0009] Further improvement lies in that the upper and lower ends of the left and right sides inside the rear axle sleeve are provided with fixing grooves, the outer side of the I-shaped block is slidably connected with the inner side of the fixing grooves, so that the positions of the rear axle sleeve and the front axle sleeve are limited after the I-shaped block is slid into the fixing grooves provided at the upper and lower ends of the rear axle sleeve and the front axle sleeve.

[0010] Further improvement lies in that the positions of the fixing grooves inside the rear axle sleeve and the front axle sleeve are provided with threaded grooves, the front and rear ends inside the I-shaped block are provided with circular holes, the outer side of the threaded rod of the fixing bolt is slidably connected with the inner side of the circular hole, and the outer side of the fixing bolt is threadedly connected with the inner side of the threaded groove, so that the fixing bolt is threadedly connected into the threaded groove through the circular hole, and the I-shaped block is installed into the fixing groove.

[0011] Further improvement lies in that the upper and lower ends of the adjacent sides of the rear axle sleeve and the front axle sleeve are provided with positioning grooves, the front and rear ends of the outer side of the positioning rod are slidably connected with the inner side of the positioning grooves, so that the rear axle sleeve and the front axle sleeve can be kept accurately connected by sliding the positioning rod into the positioning grooves when the rear axle sleeve and the front axle sleeve are sleeved to the outer end of the shaft.

[0012] Further improvement lies in that the outer side of the positioning rod is fixedly connected with a rubber pad, so that the rubber pad on the outer side of the positioning rod contacts the inner side of the positioning groove after the positioning rod is fixed into the positioning groove between the rear axle sleeve and the front axle sleeve, and the contact surface of the rear axle sleeve and the front axle sleeve is kept sealed.

[0013] Further improvement lies in that the left and right ends inside the rear axle sleeve and the front axle sleeve are provided with sealing grooves, and the sealing ring is pasted to the inner side of the sealing groove, and the side, away from the sealing groove, of the sealing ring is abutted with the outer side of the shaft, so that the sealing ring inside the rear axle sleeve and the front axle sleeve contacts the outer side of the shaft when the rear axle sleeve and the front axle sleeve are fixed to the outer end of the shaft.

[0014] Further improvement lies in that the rear end of the right end inside the rear axle sleeve and the front end of the right end inside the front axle sleeve are provided with threaded holes, so that the rear axle sleeve and the front axle sleeve are installed to the outer end of the shaft after the rear axle sleeve and the front axle sleeve are relatively fixed to the outer end of the shaft, the bolt for installing the sealing sleeve is threadedly connected into the threaded hole in the rear axle sleeve or the front axle sleeve, and then is connected to the inner part of the shaft, so that the rear axle sleeve and the front axle sleeve are installed to the outer end of the shaft.

[0015] In summary, the mechanical sealing sleeve for the pump is disclosed.

[0016] The fixing bolt is moved out of the threaded groove and then is pulled out of the circular hole in the I-shaped block by rotating the fixing bolt, then the I-shaped block is taken out of the fixing grooves at the upper and lower ends of the rear axle sleeve and the front axle sleeve, so that the rear axle sleeve and the front axle sleeve are taken off from the front and rear ends of the shaft without being pulled out from the outer side of the shaft, and the sealing sleeve can be taken off even when other parts are installed at the two ends of the shaft, so that the sealing sleeve is very convenient to disassemble and assemble.

[0017] Further, when fixing the rear shaft sleeve and the front shaft sleeve to the outer end of the shaft, the rear shaft sleeve and the front shaft sleeve can be kept accurate connection by sliding the positioning rod to the inner side of the positioning groove. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main body structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the inner side structure of the rear shaft sleeve of the utility model;

[0020] Figure 3 It is a schematic diagram of the inner side structure of the front shaft sleeve of the utility model;

[0021] Figure 4 It is a schematic diagram of the structure at the I-shaped block of the utility model.

[0022] In the drawing: 1, rear shaft sleeve; 2, front shaft sleeve; 301, I-shaped block; 302, fixed bolt; 303, positioning rod; 304, sealing ring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] Please refer to Figures 1-4 The utility model provides technical scheme: pump is with mechanical seal shaft sleeve, including rear shaft sleeve 1 and front shaft sleeve 2, front shaft sleeve 2 is connected in the front end of rear shaft sleeve 1, and the inner and outer ends of rear shaft sleeve 1 and front shaft sleeve 2 are connected with installation mechanism.

[0025] The installation mechanism includes the I-shaped block 301 connected to the outer end of the rear shaft sleeve 1 and the front shaft sleeve 2, and the upper and lower ends of the left and right sides inside the rear shaft sleeve 1 and the front shaft sleeve 2 are provided with fixed grooves, and the outer side of the I-shaped block 301 is slidably connected with the inner side of the fixed groove, so that after the I-shaped block 301 is slid into the fixed grooves opened in the upper and lower ends of the rear shaft sleeve 1 and the front shaft sleeve 2, the positions of the rear shaft sleeve 1 and the front shaft sleeve 2 are limited, so that the rear shaft sleeve 1 and the front shaft sleeve 2 cannot be located in the horizontal direction relative to each other.

[0026] The front and rear ends of the I-shaped block 301 are connected with fixing bolts 302, the rear shaft sleeve 1 and the front shaft sleeve 2 are provided with threaded grooves at positions inside the fixing grooves, the front and rear ends of the I-shaped block 301 are provided with round holes, the screw rod portions of the fixing bolts 302 are slidably connected with the inner sides of the round holes, and the outer sides of the fixing bolts 302 are threadedly connected with the inner sides of the threaded grooves, so that after the rear shaft sleeve 1 and the front shaft sleeve 2 are placed at the outer ends of the shaft inside the pump body, the I-shaped block 301 is slid into the fixing grooves, then the fixing bolts 302 are screwed into the threaded grooves through the round holes, and the I-shaped block 301 is installed into the fixing grooves, so that the rear shaft sleeve 1 and the front shaft sleeve 2 are fixedly connected with the outer ends of the shaft.

[0027] The rear shaft sleeve 1 and the front shaft sleeve 2 are connected with a positioning rod 303 inside, the upper and lower ends of the adjacent side of the rear shaft sleeve 1 and the front shaft sleeve 2 are provided with positioning grooves, and the front and rear ends of the outer side of the positioning rod 303 are slidably connected with the inner sides of the positioning grooves, so that when the rear shaft sleeve 1 and the front shaft sleeve 2 are sleeved on the outer ends of the shaft, the positioning rod 303 is slid into the positioning grooves, and the rear shaft sleeve 1 and the front shaft sleeve 2 are kept accurately connected.

[0028] The outer side of the positioning rod 303 is fixedly connected with a rubber pad, so that after the positioning rod 303 is fixed into the positioning grooves between the rear shaft sleeve 1 and the front shaft sleeve 2, the rubber pad on the outer side of the positioning rod 303 contacts the inner side of the positioning groove, the contact surface of the rear shaft sleeve 1 and the front shaft sleeve 2 is kept sealed, and external dust cannot enter the inside from the gap between the rear shaft sleeve 1 and the front shaft sleeve 2 to affect the work of the sealing shaft sleeve.

[0029] The left and right ends of the inner side of the rear shaft sleeve 1 and the front shaft sleeve 2 are connected with sealing rings 304. The left and right ends of the inner side of the rear shaft sleeve 1 and the front shaft sleeve 2 are provided with sealing grooves, and the sealing rings 304 are pasted to the inner sides of the sealing grooves, and the side, away from the sealing grooves, of the sealing rings 304 abuts against the outer side of the shaft, so that when the rear shaft sleeve 1 and the front shaft sleeve 2 are fixed to the outer ends of the shaft, the sealing rings 304 on the inner side of the rear shaft sleeve 1 and the front shaft sleeve 2 contact the outer side of the shaft, external dust cannot enter the inside of the rear shaft sleeve 1 and the front shaft sleeve 2 from the left and right ends of the rear shaft sleeve 1 and the front shaft sleeve 2 to affect the work of the sealing shaft sleeve.

[0030] Threaded holes are formed at the right end of the inner side of the rear shaft sleeve 1 and the left end of the inner side of the front shaft sleeve 2, so that after the rear shaft sleeve 1 and the front shaft sleeve 2 are fixed to the outer ends of the shaft, the bolts for installing the sealing shaft sleeve are screwed into the threaded holes in the rear shaft sleeve 1 or the front shaft sleeve 2 and then connected to the inside of the shaft, so that the rear shaft sleeve 1 and the front shaft sleeve 2 are installed to the outer ends of the shaft.

[0031] Working principle: in the sealed bush installation, first the positioning rod 303 is slid to the positioning groove in the front side of the rear bush 1, then the rear bush 1 and the front bush 2 are placed outside the pump shaft to be installed, while the front end of the positioning rod 303 is slid to the positioning groove in the rear side of the front bush 2, then the I-shaped block 301 is slid to the fixing groove in the upper and lower ends of the rear bush 1, then the fixing bolt 302 is threaded into the threaded groove after passing through the round hole, so that the I-shaped block 301 is fixed to the fixing groove, at this time the rear bush 1 and the front bush 2 are relatively fixed and connected to the outer end of the shaft, then the rear bush 1 and the front bush 2 are rotated so that the threaded hole in the inside thereof is rotated to the connecting hole in the inside of the shaft, then the bolt for fixing the sealing bush is threaded into the threaded hole and then connected to the connecting hole in the inside of the shaft, completing the installation of the sealing bush outside the pump shaft.

[0032] It should be noted that in this document, the terms "first" and "second" and the like are used merely to distinguish one entity or action from another, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by an "includes a..." statement does not exclude the existence of additional identical elements in the process, method, article, or apparatus including the one defined element.

Claims

1. A mechanical seal bushing for a pump, comprising a rear bushing (1) and a front bushing (2) connected to the front end of the rear bushing (1), characterized in that: The rear axle sleeve (1) and the front axle sleeve (2) are connected with mounting mechanisms at the inner and outer ends thereof; The mounting mechanisms comprise I-shaped blocks (301) connected to the outer ends of the rear axle sleeve (1) and the front axle sleeve (2), the I-shaped blocks (301) are connected with fixing bolts (302) at the front and rear ends thereof, the rear axle sleeve (1) and the front axle sleeve (2) are connected with positioning rods (303) at the inner ends thereof, and the inner sides of the rear axle sleeve (1) and the front axle sleeve (2) are connected with sealing rings (304) at the left and right ends thereof.

2. The mechanical seal bushing for a pump of claim 1, wherein: The upper and lower ends of the left and right sides of the rear axle sleeve (1) and the upper and lower ends of the left and right sides of the front axle sleeve (2) are provided with fixing grooves, and the outer side of the I-shaped block (301) is slidably connected to the inner side of the fixing groove.

3. The mechanical seal bushing for a pump of claim 1, wherein: The rear axle sleeve (1) and the front axle sleeve (2) are provided with threaded grooves at the positions of the fixing grooves, the front and rear ends of the I-shaped block (301) are provided with circular holes, the outer side of the screw rod of the fixing bolt (302) is slidably connected to the inner side of the circular hole, and the outer side of the fixing bolt (302) is threadedly connected to the inner side of the threaded groove.

4. The mechanical seal bushing for a pump of claim 1, wherein: The upper and lower ends of the adjacent sides of the rear axle sleeve (1) and the front axle sleeve (2) are provided with positioning grooves, and the front and rear ends of the outer side of the positioning rod (303) are slidably connected to the inner side of the positioning groove.

5. The mechanical seal bushing for a pump of claim 4, wherein: The outer side of the positioning rod (303) is fixedly connected with a rubber pad.

6. The mechanical seal bushing for a pump of claim 1, wherein: The left and right ends of the inner sides of the rear axle sleeve (1) and the front axle sleeve (2) are provided with sealing grooves, the sealing ring (304) is attached to the inner side of the sealing groove, and the side, away from the sealing groove, of the sealing ring (304) is abutted to the outer side of the shaft.

7. The mechanical seal bushing for a pump of claim 1, wherein: The inner right end of the rear axle sleeve (1) and the inner right end of the front axle sleeve (2) are provided with threaded holes.

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