A vortex pump with adjustable impeller clearance

Abstract

The present invention provides a vortex pump with adjustable impeller clearance, which belongs to the technical field of water pumps. It solves the problem that the existing vortex pumps cannot adjust the clearance according to actual needs. The vortex pump with adjustable impeller clearance includes a pump body, a pump cover, a motor, a rotating shaft and an impeller. The pump body and the pump cover form a pump chamber for accommodating the impeller. The pump body and the pump cover are fixedly connected by bolts. An annular groove is provided on the pump body. The annular groove is embedded with a sealing ring, and the sealing ring is embedded between the pump body and the pump cover. The vortex pump with adjustable impeller clearance has the advantages of being able to manually adjust the impeller clearance and having a long service life.

Description

Technical Field

[0001] The invention belongs to the technical field of water pumps and relates to an adjusting mechanism, in particular to a vortex pump with adjustable impeller clearance. Background Art

[0002] Generally, the axial clearance between the two sides of the impeller of the vortex pump and the pump body and the rear end cover is very strict, and the general clearance is 0.15-0.3mm. The clearance has a great influence on the performance of the water pump (flow rate, head, shaft power). When the clearance increases, the flow rate and head of the water pump decrease, and when the clearance decreases, the flow rate and head of the water pump increase.

[0003] The following problems often occur in the use of vortex pumps:

[0004] 1) Usually, after the vortex pump is assembled, the gap between its impeller and the pump body and its rear end cover is fixed, and the gap cannot be adjusted, resulting in the inability to adjust the performance of the vortex pump;

[0005] 2) When the vortex pump runs for a long time, the wear between the pump body and the rear end cover and the impeller increases, causing the gap to increase, resulting in reduced performance of the vortex pump;

[0006] 3) When the vortex pump is not used for a long time, the gap between the two sides of the impeller and the pump body and the rear end cover is small, causing it to rust and the impeller to get stuck.

[0007] For example, a vortex pump with a floating side plate disclosed in a Chinese patent document (application number: 201710273991.4) includes a pump cover, a pump body, an impeller, a floating side plate, and a compression spring. There are two floating side plates, which are adjacent to the impeller in the axial position and symmetrically arranged on both sides of the impeller. The floating side plate is a cylindrical shape with a through hole in the center, one side of which is a pressure plane, a high-pressure water tank is opened on the edge, and a number of spring fixing grooves are opened on the other side. The high-pressure water tank is a round chamfer with a certain arc along the edge of the pressure plane. The depth is calculated and determined according to the actual opening pressure required, and the circumference does not overlap with the flange angle of the pump cover and the pump body. The number of compression springs is consistent with the number of spring fixing grooves, one end is fixed to the fixing hole on the pump cover or pump body, and the other end is in contact with the spring fixing groove to ensure that the compression spring can be in a horizontal direction during operation. However, the vortex pump cannot adjust the gap according to actual needs, and after long-term use, the compression spring is prone to failure and cannot achieve the function of adjusting the gap. Summary of the invention

[0008] The purpose of the present invention is to solve the above problems in the prior art and to provide a vortex pump with adjustable impeller clearance, which can manually adjust the impeller clearance and has a long service life.

[0009] The objective of the present invention can be achieved through the following technical scheme: a vortex pump with adjustable impeller clearance, comprising a pump body, a pump cover, a motor, a rotating shaft and an impeller, wherein the pump body and the pump cover form a pump chamber for accommodating the impeller, and wherein the pump body and the pump cover are fixedly connected by bolts, an annular groove is provided on the pump body, a sealing ring is embedded in the annular groove, and the sealing ring is embedded between the pump body and the pump cover.

[0010] During adjustment, the tightness of the pump body and the pump cover is adjusted by turning the bolts, thereby adjusting the relative distance between the pump body and the pump cover, and adjusting the gap between the impeller and the inner wall of the pump chamber. Since the sealing ring in the annular groove is always in contact between the pump body and the pump cover, a better seal is formed, which has the advantages of simple structure and convenient adjustment.

[0011] In the above-mentioned vortex pump with adjustable impeller clearance, the outer side wall of the sealing ring is a circular arc-shaped elastic sealing surface protruding in the middle, and the elastic sealing surface abuts against the outer side wall of the pump cover. The outer side wall of the sealing ring is a circular arc-shaped elastic sealing surface protruding in the middle, and when the relative distance between the pump cover and the pump body is adjusted, the sealing ring always forms a seal between the pump body and the pump cover, which has the advantages of simple structure and good sealing effect.

[0012] In the above-mentioned vortex pump with adjustable impeller clearance, the elastic sealing surface is provided with a plurality of siphon holes, and the openings of the siphon holes are in a trumpet shape with the openings facing outward. The siphon holes are provided on the elastic sealing surface to absorb overflowing water, thereby improving the sealing effect of the sealing ring.

[0013] In the above-mentioned vortex pump with adjustable impeller clearance, the inner end of the siphon hole has a water storage part and the inner end of the water storage part is convex. When part of the water siphons into the hole, the water flowing through is absorbed by the siphon hole, which improves the sealing effect and the service life.

[0014] In the above-mentioned vortex pump with adjustable impeller clearance, two probes are inserted into the siphon hole in the middle, and the two probes extend out of the inner wall of the water storage part. The outer ends of the probes are connected to the circuit board through wires. When the water in the water storage part of the siphon hole contacts the two probes, the probes form a loop and send signals to the circuit board, which has the advantage of more reliable operation.

[0015] In the above-mentioned vortex pump with adjustable impeller clearance, the elastic sealing surface of the sealing ring is wavy and the ratio of the wave height h of the elastic sealing surface to the outer diameter D of the sealing ring is 1:30-1:50. With the above-mentioned arrangement, the sealing ring has a better sealing effect.

[0016] In the above-mentioned vortex pump with adjustable impeller clearance, the inner side wall of the annular groove is provided with a wavy sealing groove and the elastic sealing surface is embedded in the sealing groove. The elastic sealing surface is embedded in the sealing groove to form multiple seals and has a better sealing effect.

[0017] In the above-mentioned vortex pump with adjustable impeller clearance, a mechanical seal is provided between the pump cover and the rotating shaft. The mechanical seal is provided between the pump cover and the rotating shaft, which has a good sealing effect.

[0018] Compared with the prior art, the vortex pump with adjustable impeller clearance has the following advantages:

[0019] 1. The tightness of the pump body and the pump cover can be adjusted by turning the bolts, thereby adjusting the relative distance between the pump body and the pump cover, so as to adjust the gap between the impeller and the inner wall of the pump chamber. Since the sealing ring in the annular groove is always close to the pump body and the pump cover, a good seal is formed, which has the advantages of simple structure and convenient adjustment.

[0020] 2. The outer wall of the sealing ring is an arc-shaped elastic sealing surface with a protruding middle part. When the relative distance between the pump cover and the pump body is adjusted, the sealing ring always forms a seal between the pump body and the pump cover, which has the advantages of simple structure and good sealing effect;

[0021] 3. The elastic sealing surface is provided with a siphon hole, which can absorb the overflowing water, thereby improving the sealing effect of the sealing ring;

[0022] 4. When the water in the water storage part of the siphon hole contacts the two probes, the probes form a loop and send signals to the circuit board, which has the advantage of more reliable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional schematic diagram of the first embodiment of the vortex pump.

[0024] Figure 2 It is a cross-sectional schematic diagram of the sealing ring of the first embodiment of the vortex pump.

[0025] Figure 3 It is a cross-sectional schematic diagram of another sealing ring of the first embodiment of the vortex pump.

[0026] Figure 4 It is a cross-sectional schematic diagram of the sealing ring of the second embodiment of the vortex pump.

[0027] In the figure, 1, pump body; 2, pump cover; 3, motor; 4, rotating shaft; 5, annular groove; 6, sealing ring; 6a, elastic sealing surface; 6b, siphon hole; 6c, water storage part; 7, probe; 8, mechanical seal; 9, impeller; 10, bolts. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0029] Embodiment 1

[0030] like Figure 1 and 2 As shown, a vortex pump with adjustable impeller clearance includes a pump body 1, a pump cover 2, a motor 3, a rotating shaft 4 and an impeller 9. The pump body 1 and the pump cover 2 form a pump chamber for accommodating the impeller 9. The pump body 1 and the pump cover 2 are fixedly connected by bolts 10. An annular groove 5 is provided on the pump body 1. A sealing ring 6 is embedded in the annular groove 5. The sealing ring 6 is embedded between the pump body 1 and the pump cover 2. A mechanical seal 8 is provided between the pump cover 2 and the rotating shaft 4, which has a good sealing effect.

[0031] The outer side wall of the sealing ring 6 is an arc-shaped elastic sealing surface 6 a convex in the middle, and the elastic sealing surface 6 a abuts against the outer side wall of the pump cover 2 .

[0032] When adjusting the gap, the tightness of the pump body 1 and the pump cover 2 is adjusted by rotating the bolt 10, thereby adjusting the relative distance between the pump body 1 and the pump cover 2, so as to adjust the gap between the impeller 9 and the inner wall of the pump chamber. Since the sealing ring 6 in the annular groove 5 is always in contact with the pump body 1 and the pump cover 2, a good seal is formed, which has the advantages of simple structure and convenient adjustment. The outer wall of the sealing ring 6 is a circular arc-shaped elastic sealing surface 6a protruding in the middle. When adjusting the relative distance between the pump cover 2 and the pump body 1, the sealing ring 6 always makes the pump body 1 and the pump cover 2 form a seal, which has the advantages of simple structure and good sealing effect.

[0033] As another way, Figure 3 As shown, a plurality of siphon holes 6b are provided on the elastic sealing surface 6a, and the openings of the siphon holes 6b are in a trumpet shape with the openings facing outwards, and the inner end of the siphon hole 6b has a water storage portion 6c, and the inner end of the water storage portion 6c is in a convex belly shape. Two probes 7 are inserted into the siphon hole 6b located in the middle, and the two probes 7 extend out of the inner side wall of the water storage portion 6c. Since the siphon hole 6b can absorb overflowing water into the water storage portion 6c, when the water in the water storage portion 6c contacts the two probes 7, the probes 7 form a loop and send signals to the circuit board, which has the advantage of being more reliable in operation.

[0034] Embodiment 2

[0035] The structure and principle of this embodiment are roughly the same as those of the first embodiment, except that: Figure 4As shown, the elastic sealing surface 6a of the sealing ring 6 is wavy and the ratio of the wave height h of the elastic sealing surface 6a to the outer diameter D of the sealing ring 6 is 1:30-1:50. The inner side wall of the annular groove 5 is provided with a wavy sealing groove and the elastic sealing surface 6a is embedded in the sealing groove, and the elastic sealing surface 6a is embedded in the sealing groove to form multiple seals with a good sealing effect.

[0036] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0037] Although the present invention uses more terms such as pump body 1, pump cover 2, motor 3, rotating shaft 4, annular groove 5, sealing ring 6, elastic sealing surface 6a, siphon hole 6b, water storage part 6c, probe 7, mechanical seal 8, impeller 9, bolt 10, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A vortex pump with adjustable impeller clearance, comprising a pump body (1), a pump cover (2), a motor (3), a rotating shaft (4) and an impeller (9), wherein the pump body (1) and the pump cover (2) form a pump chamber for accommodating the impeller (9), characterized in that: The pump body (1) and the pump cover (2) are fixedly connected by bolts (10); an annular groove (5) is provided on the pump body (1); a sealing ring (6) is embedded in the annular groove (5); the sealing ring (6) is embedded between the pump body (1) and the pump cover (2); the outer wall of the sealing ring (6) is an arc-shaped elastic sealing surface (6a) with a protruding middle portion, and the elastic sealing surface (6a) abuts against the outer wall of the pump cover (2); a plurality of siphon holes (6b) are provided on the elastic sealing surface (6a), and the openings of the siphon holes (6b) are in a trumpet shape with the openings facing outwards; the inner ends of the siphon holes (6b) have a water storage portion (6c), and the inner ends of the water storage portions (6c) are in a convex belly shape; Two probes (7) are inserted into the siphon hole (6b) located in the middle, and the two probes (7) extend out of the inner wall of the water storage part (6c); At least four siphon holes (6b) are arranged on the elastic sealing surface (6a), the two middle siphon holes (6b) are located on both sides of the maximum diameter portion of the elastic sealing surface (6a), and the two probes (7) are respectively located in the two middle siphon holes (6b); When water in the reservoir contacts the two probes, the probes complete a circuit and send a signal to the circuit board.

2. A vortex pump with adjustable impeller clearance according to claim 1, characterized in that: A mechanical seal (8) is provided between the pump cover (2) and the rotating shaft (4).

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