Shaft sleeve for centrifugal pump

Abstract

The utility model relates to the field of centrifugal pump shaft sleeves, and discloses a shaft sleeve for a centrifugal pump, which comprises two groups of end sleeves, a main body is contacted between the two groups of end sleeves, T-shaped grooves are arranged at two ends of the main body and the inner side ends of the end sleeves, key grooves are arranged inside the main body and the end sleeves, a T-shaped block is slidably connected inside the T-shaped groove at the left end, and a T-shaped groove is arranged inside the key groove at the right end. Clamping grooves are fixedly connected to the right portions of the two ends of the main body, clamping blocks are slidably connected to the interiors of the clamping grooves, the side ends of the clamping blocks are elastically connected to the interiors of the side ends of end sleeves through first springs, and positioning grooves are formed in the interiors of the left ends of the end sleeves. According to the device, the clamping block can slide out of the clamping groove by extruding the clamping block, then the end sleeve can slide horizontally, the end sleeve can drive the T-shaped block to slide out of the T-shaped groove, at the moment, the clamping groove slides out of the T-shaped groove, the end sleeve can be replaced, the main body does not need to be replaced through replacement of the end sleeve, replacement of the whole device is reduced, and the cost is reduced. And the waste of materials is reduced.

Description

Technical Field

[0001] The utility model relates to the field of centrifugal pump shaft sleeves, in particular to a shaft sleeve for a centrifugal pump. Background Technique

[0002] The sleeve is fixed on and cooperates with the pump shaft to support the rotor of the pump (usually the impeller), enabling it to rotate freely within the pump casing. It can bear the axial load generated by the rotation of the impeller and maintain an appropriate gap between the impeller and the pump casing, thereby enabling the pump to effectively suck and discharge liquid.

[0003] After retrieval, Chinese Patent Publication No.: CN209586762U discloses a leak-proof shaft sleeve for a water centrifugal pump, which includes an annular groove provided on the inner circular wall of the shaft sleeve near the contact end with the pump impeller, and the position of the annular groove is at the position where the inner circular hole of the shaft sleeve and the journal of the pump shaft have relative fit; a sealing ring is arranged in the annular groove; the utility model has low transformation and maintenance costs, greatly improves work efficiency, reduces the overhaul frequency of the pump, and effectively avoids the leakage of liquid medium along the inner wall of the water centrifugal pump shaft sleeve to the outside of the pump.

[0004] In the above technology, although the overhaul frequency of the pump can be reduced, wear and other situations will occur at both ends of the shaft sleeve during use, resulting in the shaft sleeve becoming unstable during use, and the need to replace the entire shaft sleeve. In a larger centrifugal pump used in a ship's hull or the like, replacing the shaft sleeve will cause waste of materials. For this reason, a shaft sleeve for a centrifugal pump is proposed to solve the above problems. Summary of the Invention

[0005] In order to make up for the above deficiencies, the utility model provides a shaft sleeve for a centrifugal pump, aiming to improve the problem that both ends of the shaft sleeve need to be replaced as a whole due to wear in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: A shaft sleeve for a centrifugal pump includes end sleeves, a main body is in contact with the middle of the two groups of end sleeves, T-shaped grooves are opened at both ends of the main body and the inner side ends of the end sleeves, key grooves are opened inside the main body and the end sleeves, a T-shaped block is slidably connected inside the left T-shaped groove, clamping grooves are fixedly connected to the right parts of both ends of the main body, a clamping block is slidably connected inside the clamping groove, the side end of the clamping block is elastically connected to the inner side end of the end sleeve through a first spring, a positioning groove is opened inside the left end of the end sleeve, a positioning block is slidably connected inside the positioning groove, and a protection assembly is arranged outside the main body.

[0007] As a further description of the above technical solution:

[0008] The protection assembly includes a ceramic coating, and a galvanized coating is fixedly connected to the outside of the ceramic coating.

[0009] As a further description of the above technical solution:

[0010] The outside of the T-shaped block is slidably connected to the inside of the T-shaped groove.

[0011] As a further description of the above technical solution:

[0012] The outside of the card slot is slidably connected to the inside of the T-shaped groove.

[0013] As a further description of the above technical solution:

[0014] One end of the first spring is fixedly connected to the side of the clamping block, and the other end of the first spring is fixedly connected to the inside of the side end of the end sleeve.

[0015] As a further description of the above technical solution:

[0016] The side of the positioning block is fixedly connected to the outside of the side end of the clamping block.

[0017] As a further description of the above technical solution:

[0018] The inside of the ceramic coating is fixedly connected to the outside of the main body.

[0019] As a further description of the above technical solution:

[0020] The side ends of the galvanized coating and the ceramic coating are in contact with the side of the end sleeve.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, by squeezing the clamping block, it can slide out of the inside of the card slot. Subsequently, the end sleeve can be slid horizontally. The end sleeve can drive the T-shaped block to slide out of the inside of the T-shaped groove. At this time, the card slot slides out of the inside of the T-shaped groove, and the end sleeve can be replaced. By replacing the end sleeve, it is not necessary to replace the main body, reducing the replacement of the overall device and reducing the waste of materials.

[0023] 2. In the utility model, the main body can be protected by the ceramic coating to prevent the metal material of the main body from being worn and corroded by seawater. And the main body can be better protected by the galvanized coating to prevent the generation of wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall schematic diagram of a shaft sleeve for a centrifugal pump proposed by the utility model;

[0025] Figure 2 It is a cross-sectional view of the end sleeve of a shaft sleeve for a centrifugal pump proposed by the utility model;

[0026] Figure 3Schematic diagram of a clamping block of a shaft sleeve for a centrifugal pump proposed by the present utility model;

[0027] Figure 4 Schematic cross-sectional view of the main body of a shaft sleeve for a centrifugal pump proposed by the present utility model.

[0028] Legend:

[0029] 1. End sleeve; 2. Galvanized coating; 3. Keyway; 4. T-slot; 5. T-block; 6. Spring I; 7. Positioning block; 8. Clamping block; 9. Ceramic coating; 10. Main body; 11. Card slot; 12. Positioning slot. Specific implementation mode

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] Refer to Figure 1 , Figure 3 and Figure 4 , an embodiment provided by the present utility model: A shaft sleeve for a centrifugal pump includes an end sleeve 1, the end sleeve 1 is fixed at both ends of the main body 10, and contacting with the pump body and the rotor can prevent the wear and replacement of the main body 10, reducing the waste of materials. The main body 10 is contacted between two groups of end sleeves 1, and the main body 10 can support and fix the end sleeves 1 at both ends. T-slots 4 are opened at both ends of the main body 10 and the inner side ends of the end sleeves 1. The T-slot 4 can be clamped with the T-block 5 and the card slot 11, so as to keep the positions of the end sleeve 1 and the main body 10 relatively fixed. Keyways 3 are opened inside the main body 10 and the end sleeve 1. The keyway 3 can be clamped with the groove key so that the main body 10 and the end sleeve 1 are relatively fixed with respect to the shaft body of the centrifugal pump. The T-block 5 is slidably connected inside the left T-slot 4, and the outside of the T-block 5 is slidably connected inside the T-slot 4. By horizontal sliding, the T-block 5 and the card slot 11 can be slid out of the inside of the T-slot 4, so that the end sleeve 1 can be replaced. Card slots 11 are fixedly connected to the right parts of both ends of the main body 10, the outside of the card slot 11 is slidably connected inside the T-slot 4, and a square groove is opened at the side end of the card slot 11 and can be clamped with the clamping block 8, so as to keep the main body 10 and the end sleeve 1 relatively fixed, facilitating installation, and enabling the whole device to be installed on the shaft of the centrifugal pump.

[0032] Refer to Figures 1-3, a clamping block 8 is slidably connected inside the card slot 11. An arc surface is provided at the side end of the clamping block 8. The arc surface can be squeezed by the card slot 11 and can slide into and out of the inside of the T-shaped slot 4, so that the card slot 11 can slide into the inside of the T-shaped slot 4 at the side end of the end sleeve 1. The side end of the clamping block 8 is elastically connected inside the side end of the end sleeve 1 through a first spring 6. One end of the first spring 6 is fixedly connected to the side of the clamping block 8. The first spring 6 can be squeezed to make the clamping block 8 slide into the inside of the card slot 11 to keep the card slot 11 relatively fixed, so that the end sleeve 1 and the main body 10 are fixedly installed. The other end of the first spring 6 is fixedly connected inside the side end of the end sleeve 1. A positioning groove 12 is provided inside the left end of the end sleeve 1. The positioning groove 12 restricts the positioning block 7 to only slide horizontally within a fixed distance relative to the end sleeve 1. The positioning block 7 is slidably connected inside the positioning groove 12. The side of the positioning block 7 is fixedly connected to the outside of the side end of the clamping block 8. The positioning block 7 restricts the clamping block 8 from completely sliding out of the inside of the end sleeve 1. A protective component is provided outside the main body 10.

[0033] Refer to Figure 1 , Figure 2 and Figure 4 , the protective component includes a ceramic coating 9. The ceramic coating 9 can protect the outer surface of the main body 10 to prevent the main body 10 from being worn and corroded. The inside of the ceramic coating 9 is fixedly connected to the outside of the main body 10. The main body 10 keeps the ceramic coating 9 fixedly formed. A galvanized coating 2 is fixedly connected to the outside of the ceramic coating 9. The galvanized coating 2 has good wear resistance and can provide better protection for the main body 10 to prevent wear and reduce the replacement caused by the wear of the overall device. The side ends of the galvanized coating 2 and the ceramic coating 9 are in contact with the side of the end sleeve 1.

[0034] Working principle: When the end sleeve 1 is worn, the overall device can be slid out of the inside of the centrifugal pump. Then, the clamping block 8 inside the overall device can be squeezed to slide out of the inside of the T-shaped slot 4, driving the positioning block 7 to slide and squeezing the first spring 6. When the clamping block 8 slides out of the inside of the card slot 11, then it can be slid horizontally to make the T-shaped block 5 slide out of the inside of the T-shaped slots 4 at both ends of the main body 10. At this time, the card slot 11 slides out of the inside of the T-shaped slot 4 at the side end of the end sleeve 1. Then, the clamping block 8 is released, so that the clamping block 8 slides into the inside of the T-shaped slot 4 under the extrusion of the first spring 6 until the positioning block 7 is restricted by the positioning groove 12 and stops sliding. Then, the T-shaped block 5 at the side end of the new end sleeve 1 is slid into the inside of the T-shaped slot 4 of the main body 10. At this time, the card slot 11 slides into the T-shaped slot 4 of the end sleeve 1, and the arc surface of the clamping block 8 is squeezed and slides into the inside of the end sleeve 1 to squeeze the first spring 6. Then, the clamping block 8 slides into the inside of the card slot 11 under the extrusion of the first spring 6 to keep the end sleeve 1 and the main body 10 relatively fixed. Then, the overall device is slid onto the shaft body of the centrifugal pump so that the overall device is clamped and fixed by the shaft body and the groove key, enabling it to stably support the rotor. The ceramic coating 9 and the galvanized coating 2 can protect the main body 10.

[0035] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A shaft sleeve for a centrifugal pump, comprising an end sleeve (1), characterized in that: A main body (10) is in contact with the middle of two groups of the end sleeves (1). T-shaped grooves (4) are formed at both ends of the main body (10) and the inner side ends of the end sleeves (1). Key grooves (3) are formed inside both the main body (10) and the end sleeves (1). A T-shaped block (5) is slidably connected inside the left T-shaped groove (4). At the right parts of both ends of the main body (10), clamping grooves (11) are fixedly connected. A clamping block (8) is slidably connected inside the clamping groove (11). The side end of the clamping block (8) is elastically connected to the inner side end of the side of the end sleeve (1) through a first spring (6). A positioning groove (12) is formed inside the left end of the end sleeve (1). A positioning block (7) is slidably connected inside the positioning groove (12). A protection component is arranged outside the main body (10).

2. The shaft sleeve for a centrifugal pump according to claim 1, characterized in that: The protection component includes a ceramic coating (9), and a galvanized coating (2) is fixedly connected to the outside of the ceramic coating (9).

3. The shaft sleeve for a centrifugal pump according to claim 1, wherein: The outside of the T-shaped block (5) is slidably connected inside the T-shaped groove (4).

4. The shaft sleeve for a centrifugal pump according to claim 1, wherein: The outside of the clamping groove (11) is slidably connected inside the T-shaped groove (4).

5. A shaft sleeve for a centrifugal pump according to claim 1, characterized in that: One end of the first spring (6) is fixedly connected to the side part of the clamping block (8), and the other end of the first spring (6) is fixedly connected to the inner side end of the side of the end sleeve (1).

6. The shaft sleeve for a centrifugal pump according to claim 1, characterized in that: The side part of the positioning block (7) is fixedly connected to the outside of the side end of the clamping block (8).

7. A shaft sleeve for a centrifugal pump according to claim 2, characterized in that: The inside of the ceramic coating (9) is fixedly connected to the outside of the main body (10).

8. The shaft sleeve for a centrifugal pump according to claim 2, characterized in that: The side ends of the galvanized coating (2) and the ceramic coating (9) are in contact with the side part of the end sleeve (1).

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