High-lift balanced multi-stage slurry pump

Abstract

The application belongs to the technical field of slurry pump equipment, and specifically discloses a high-lift balanced multistage slurry pump, which comprises a slurry pump body, a transmission shaft and a bracket, the slurry pump body comprises a pump cover, a first-stage pump body and a second-stage pump body are arranged in the pump cover, a partition plate is arranged between the first-stage pump body and the second-stage pump body, a first-stage impeller is arranged in the first-stage pump body, a second-stage impeller is arranged in the second-stage pump body, and the first-stage impeller and the second-stage impeller are arranged in opposite directions; a shaft seal structure is arranged at one end of the transmission shaft close to a feed inlet, the shaft seal structure comprises a shaft seal shaft sleeve, a shaft seal static ring is fixedly installed at the rightmost end of the shaft seal shaft sleeve, a shaft seal dynamic ring is arranged on one side of the shaft seal static ring, a shaft seal gland is arranged on the shaft seal dynamic ring, a spring seat is connected to one side of the shaft seal gland, a plurality of springs are arranged on one side of the spring seat in an axial direction, the other side of the spring is connected to the side edge of the push ring, and a positioning ring is arranged on one side of the spring seat and arranged on the shaft seal shaft sleeve.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slurry pump equipment, in particular to a high-lift balanced multi-stage slurry pump. BACKGROUND

[0002] The slurry pump refers to a kind of machinery that can increase the energy of solid-liquid mixed medium by centrifugal force (rotation of pump impeller) and convert electric energy into kinetic energy and potential energy of medium. It is mainly suitable for mining, power plant, dredging, metallurgy, chemical industry, building materials and petroleum industry. The high-lift balanced multi-stage slurry pump is a new generation of high-lift slurry pump product developed on the basis of absorbing foreign advanced technology, combined with the use of domestic high-lift slurry pump and problems encountered. It has the characteristics of high-lift, low axial force and low shaft seal pressure. It has unique effect in conveying tailing slurry and conveying filter press feed slurry.

[0003] The existing single slurry pump has the problem of high-lift and large axial force. As the pump lift continues to rise, the sealing part of the slurry pump is prone to leakage, which causes the slurry pump to be unable to work normally and other problems. SUMMARY

[0004] The purpose of the present application is to provide a high-lift balanced multi-stage slurry pump to solve the problems raised in the background.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a high-lift balanced multi-stage slurry pump, comprising a slurry pump body, a transmission shaft and a bracket, the bracket is provided with a bearing seat above, the center of the bearing seat is fixed with a transmission shaft above; the slurry pump body comprises a pump cover, the rightmost side of the pump cover is provided with a feed inlet, one side of the pump cover is provided with a discharge port, a first pump body and a second pump body are arranged in the pump cover, the first pump body and the second pump body are separated by a partition plate arranged in the middle, a first impeller is arranged in the first pump body, a second impeller is arranged in the second pump body, and the first impeller and the second impeller are arranged back to back; the end of the transmission shaft close to the feed inlet is provided with a shaft seal structure, the shaft seal structure comprises a shaft seal sleeve, a shaft seal static ring and a shaft seal dynamic ring, the shaft seal sleeve is fixed at the end of the transmission shaft close to the feed inlet, the rightmost end of the shaft seal sleeve is fixedly provided with a shaft seal static ring, the shaft seal static ring is fixed in the slot of the shaft seal sleeve, the shaft seal static ring is provided with a shaft seal dynamic ring on one side, the side of the shaft seal dynamic ring away from the shaft seal static ring is provided with a slot, a push ring is fixed in the slot, the shaft seal dynamic ring is provided with a shaft seal gland, one side of the shaft seal gland is connected with a spring seat, a gap is left between the spring seat and the shaft seal dynamic ring, a plurality of springs are arranged on one side of the spring seat, the other side of the spring is connected with the side edge of the push ring, and the spring seat is provided with a positioning ring on one side and arranged on the shaft seal sleeve.

[0006] Preferably, the bearing seat is fixed to the transmission shaft at both ends.

[0007] Preferably, the first-stage impeller is fixedly installed on the outer circumferential wall of the first-stage impeller shaft sleeve, and the second-stage impeller is fixedly installed on the outer circumferential wall of the second-stage impeller shaft sleeve.

[0008] Preferably, one end of the second-stage pump body is connected to the discharge port.

[0009] Preferably, the pump cover is arranged outside the first-stage pump body and the second-stage pump body after the left and right covers are closed.

[0010] Preferably, wear-resistant inner liners are arranged on the inner side walls of the first-stage pump body and the second-stage pump body, and the material of the inner liners is zirconia-alumina composite ceramic.

[0011] Preferably, a cover plate is arranged at the center of the left side of the pump cover, a sealing shaft sleeve is arranged at the center of the cover plate, and the sealing shaft sleeve is sleeved on the transmission shaft.

[0012] Preferably, a plurality of fixing holes are annularly arranged at one end of the shaft sealing sleeve.

[0013] Preferably, a plurality of limiting holes are equidistantly arranged on the positioning ring, and the limiting holes are arranged in correspondence with the fixing holes.

[0014] Preferably, a plurality of positioning screw holes are arranged on the side of the spring seat close to the positioning ring, and the arrangement direction of the positioning screw holes is the same as the arrangement direction of the transmission shaft.

[0015] Compared with the prior art, the beneficial effects of the present application are as follows: the present application adopts a double-impeller back-to-back structure, the axial forces of the two impellers are offset to each other, the device has high lift and small axial force; the shaft sealing structure is arranged at the feed inlet, the shaft sealing structure is subjected to small pressure and does not change with the change of the pump lift, can effectively transport slurry to a remote place, avoids the use of a slurry pump series connection scheme, damage of the shaft sealing structure, leakage at the sealing part, and normal use of the device, and solves the problem of high cost of users. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a sectional view of the overall structure of the present application;

[0017] Fig. 2 is a sectional view of the shaft sealing structure of the present application.

[0018] In the figure: 1, transmission shaft; 2, bracket; 3, bearing seat; 4, bearing gland; 5, sealing sleeve; 6, cover plate; 7, two-stage pump body; 8, partition plate; 9, two-stage impeller; 10, second impeller sleeve; 11, one-stage pump body; 12, one-stage impeller; 13, first impeller sleeve; 14, pump cover; 15, feed inlet; 16, discharge outlet; 17, shaft seal structure; 18, shaft seal sleeve; 19, shaft seal static ring; 20, shaft seal dynamic ring; 21, push ring; 22, shaft seal gland; 23, spring; 24, positioning ring; 25, fixing hole; 26, limiting hole; 27, spring seat; 28, positioning screw hole. DETAILED DESCRIPTION

[0019] 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. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "vertical", "upper", "lower", "horizontal" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0021] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] Please refer to Figs. 1-2The application provides a technical scheme: a high-lift balanced multistage slurry pump, which comprises a slurry pump body, a transmission shaft 1 and a bracket 2, a bearing seat 3 is arranged above the bracket 2, and the transmission shaft 1 is fixed at the upper center of the bearing seat 3; the slurry pump body comprises a pump cover 14, a feeding port 15 is arranged at the rightmost side of the pump cover 14, a discharging port 16 is arranged at one side of the pump cover 14, a first-stage pump body 11 and a second-stage pump body 7 are arranged in the pump cover 14, a partition plate 8 is arranged between the first-stage pump body 11 and the second-stage pump body 7, a first-stage impeller 12 is arranged in the first-stage pump body 11, a second-stage impeller 9 is arranged in the second-stage pump body 7, and the first-stage impeller 12 and the second-stage impeller 9 are arranged in opposite directions; a shaft seal structure 17 is arranged at one end of the transmission shaft 1 close to the feeding port 15, the shaft seal structure 17 comprises a shaft seal shaft sleeve 18, a shaft seal static ring 19 and a shaft seal dynamic ring 20, the shaft seal shaft sleeve 18 is fixed at one end of the transmission shaft 1 close to the feeding port 15, the shaft seal static ring 19 is fixedly installed at the rightmost end of the shaft seal shaft sleeve 18, the shaft seal static ring 19 is fixed in a slot of the shaft seal shaft sleeve 18, the shaft seal dynamic ring 20 is arranged at one side of the shaft seal static ring 19, a slot is arranged on the side, away from the shaft seal static ring 19, of the shaft seal dynamic ring 20, a push ring 21 is fixed in the slot, a shaft seal gland 22 is arranged on the shaft seal dynamic ring 20, one side of the shaft seal gland 22 is connected with a spring seat 27, a gap is formed between the spring seat 27 and the shaft seal dynamic ring 20, a plurality of springs 23 are arranged on one side of the spring seat 27 in the axial direction, the other side of the spring 23 is connected with the side edge of the push ring 21, and a positioning ring 24 is arranged on one side of the spring seat 27 and is sleeved on the shaft seal shaft sleeve 18.

[0023] Further, the bearing seat 3 is provided with bearing glands 4 fixed at the two ends of the transmission shaft 1.

[0024] Further, the first-stage impeller 12 is fixedly installed on the outer circumferential wall of a first-stage impeller shaft sleeve 13, and the second-stage impeller 9 is fixedly installed on the outer circumferential wall of a second-stage impeller shaft sleeve 10.

[0025] Further, one end of the second-stage pump body 7 is connected with the discharging port 16.

[0026] Further, the pump cover 14 is arranged outside the first-stage pump body 11 and the second-stage pump body 7 after being closed on the left and right sides.

[0027] Further, wear-resistant inner linings are arranged on the inner side walls of the first-stage pump body 11 and the second-stage pump body 7, the material of the inner linings is zirconia-alumina composite ceramic, the inner linings have high hardness of alumina ceramic and high toughness of zirconia ceramic, and perfectly match the working environment of the slurry pump.

[0028] Further, a cover plate 6 is arranged at the central position on the left side of the pump cover 14, a sealing shaft sleeve 5 is installed at the center of the cover plate 6, and the sealing shaft sleeve 5 is sleeved on the transmission shaft 1.

[0029] Furthermore, a plurality of fixing holes 25 are annularly provided at one end of the shaft sealing sleeve 18 .

[0030] Furthermore, a plurality of limiting holes 26 are equidistantly provided on the positioning ring 24 , and the limiting holes 26 are correspondingly provided to the fixing holes 25 .

[0031] Furthermore, a plurality of positioning screw holes 28 are provided on one side of the spring seat 27 close to the positioning ring 24 , and the positioning screw holes 28 are provided in the same direction as that of the transmission shaft 1 .

[0032] Working principle: The present invention provides a high-lift balanced multi-stage slurry pump, including a slurry pump body, a transmission shaft 1 and a bracket 2, a bearing seat 3 is arranged above the bracket 2, and the transmission shaft 1 is fixed at the center above the bearing seat 3; the slurry pump body includes a pump cover 14, a feed port 15 is arranged on the rightmost side of the pump cover 14, and a discharge port 16 is arranged on one side of the pump cover 14, a first-level pump body 11 and a second-level pump body 7 are arranged in the pump cover 14, a partition plate 8 is arranged between the first-level pump body 11 and the second-level pump body 7 to separate them, a first-level impeller 12 is arranged in the first-level pump body 11, a second-level impeller 9 is arranged in the second-level pump body 7, and the first-level impeller 12 and the second-level impeller 9 are arranged back to back; the double impellers have a back-to-back structure, and the axial forces of the impellers on both sides offset each other, so that the device has a high lift and a small axial force.

[0033] The end of the transmission shaft 1 close to the feed port 15 is provided with a shaft sealing structure 17, and the shaft sealing structure 17 includes a shaft sealing sleeve 18, a shaft sealing static ring 19 and a shaft sealing dynamic ring 20. The shaft sealing sleeve 18 is fixed to the end of the transmission shaft 1 close to the feed port 15, and the shaft sealing static ring 19 is fixedly installed on the rightmost end of the shaft sealing sleeve 18. The shaft sealing static ring 19 is fixed in the groove of the shaft sealing sleeve 18, and a shaft sealing dynamic ring 20 is provided on one side of the shaft sealing static ring 19. A groove is provided on the side of the shaft sealing dynamic ring 20 away from the shaft sealing static ring 19, and a push ring 21 is fixed in the groove. The outer sleeve of the shaft sealing dynamic ring 20 is provided with a shaft sealing cover 22, and one side of the shaft sealing cover 22 is connected to a spring seat 27, and the spring seat 27 is connected to the shaft A gap is left between the sealing rings 20, and a plurality of springs 23 are axially arranged on one side of the spring seat 27. The other side of the spring 23 is connected to the side of the push ring 21. A positioning ring 24 is provided on one side of the spring seat 27 and is sleeved on the shaft sealing sleeve 18; the shaft sealing structure 17 is arranged at the suction end, and the pressure received by the shaft sealing structure 17 is small during the slurry pump, and the pressure received will no longer change with the head change, and it is also easier to disassemble and assemble; when the slurry pump body sucks mud, the fluid pressure is transmitted to the shaft sealing sleeve 18, and the shaft sealing sleeve 18 is transmitted to the shaft sealing dynamic ring 20 and the shaft sealing static ring 19. A spring 23 and a spring seat 27 are provided on one side of the shaft sealing dynamic ring 20. The spring 23 disperses the pressure during fluid flow, thereby improving the service life of the shaft sealing structure 17.

[0034] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since numerous changes, modifications, substitutions and variations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A high-lift balanced multi-stage slurry pump, characterized by: The invention comprises a slurry pump body, a transmission shaft (1) and a bracket (2), wherein a bearing seat (3) is provided above the bracket (2), and the transmission shaft (1) is fixed at the center above the bearing seat (3); the slurry pump body comprises a pump cover (14), wherein a feed port (15) is provided on the rightmost side of the pump cover (14), and a discharge port (16) is provided on one side of the pump cover (14), and a primary pump body (11) and a secondary pump body (7) are provided in the pump cover (14), wherein the primary pump body (1 1) is separated from the secondary pump body (7) by a partition (8), a primary impeller (12) is provided in the primary pump body (11), a secondary impeller (9) is provided in the secondary pump body (7), and the primary impeller (12) and the secondary impeller (9) are arranged in opposite directions; a shaft seal structure (17) is provided at one end of the transmission shaft (1) close to the feed port (15), and the shaft seal structure (17) includes a shaft seal sleeve (18), a shaft seal static ring (19) and a shaft seal dynamic ring (20) The shaft seal sleeve (18) is fixed to one end of the transmission shaft (1) near the feed port (15), and a shaft seal static ring (19) is fixedly installed at the rightmost end of the shaft seal sleeve (18). The shaft seal static ring (19) is fixed in the slot of the shaft seal sleeve (18), and a shaft seal dynamic ring (20) is provided on one side of the shaft seal static ring (19). A slot is provided on the side of the shaft seal dynamic ring (20) away from the shaft seal static ring (19), and a push ring (20) is fixed in the slot. 1), the outer cover of the shaft seal dynamic ring (20) is provided with a shaft seal gland (22), one side of the shaft seal gland (22) is connected to a spring seat (27), a gap is left between the spring seat (27) and the shaft seal dynamic ring (20), a plurality of springs (23) are axially arranged on one side of the spring seat (27), the other side of the spring (23) is connected to the side of the push ring (21), and a positioning ring (24) is provided on one side of the spring seat (27) and is sleeved on the shaft seal sleeve (18).

2. A high-lift balanced multi-stage slurry pump according to claim 1, characterized in that: The bearing seat (3) is fixed with bearing covers (4) at both ends of the transmission shaft (1).

3. The high-lift balanced multi-stage slurry pump according to claim 1, characterized in that: The first-stage impeller (12) is fixedly mounted on the outer circumferential wall of the first impeller shaft sleeve (13), and the second-stage impeller (9) is fixedly mounted on the outer circumferential wall of the second impeller shaft sleeve (10).

4. The high-lift balanced multi-stage slurry pump according to claim 1, characterized in that: One end of the secondary pump body (7) is connected to the discharge port (16).

5. The high-lift balanced multi-stage slurry pump according to claim 1, characterized in that: The pump cover (14) is arranged outside the primary pump body (11) and the secondary pump body (7) after the left and right sides are covered.

6. The high-lift balanced multi-stage slurry pump according to claim 1, characterized in that: Wear-resistant linings are provided on the inner side walls of the first-stage pump body (11) and the second-stage pump body (7), and the linings are made of zirconium oxide alumina composite ceramics.

7. The high-lift balanced multi-stage slurry pump according to claim 1, characterized in that: A cover plate (6) is provided at the center position of the left side of the pump cover (14), a sealing sleeve (5) is installed at the center of the cover plate (6), and the sealing sleeve (5) is sleeved on the transmission shaft (1).

8. The high-lift balanced multi-stage slurry pump according to claim 1, characterized in that: One end of the shaft seal sleeve (18) is provided with a plurality of fixing holes (25) in an annular shape.

9. The high-lift balanced multi-stage slurry pump according to claim 8, characterized in that: A plurality of limiting holes (26) are equidistantly arranged on the positioning ring (24), and the limiting holes (26) are arranged corresponding to the fixing holes (25).

10. The high-lift balanced multi-stage slurry pump according to claim 1, characterized in that: A plurality of positioning screw holes (28) are provided on one side of the spring seat (27) close to the positioning ring (24), and the positioning screw holes (28) are provided in the same direction as the transmission shaft (1).

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