WO2017067252A1

WO2017067252A1 - Runner structure for vortex pump

Info

Publication number: WO2017067252A1
Application number: PCT/CN2016/090688
Authority: WO
Inventors: 许敏田; 任兵; 郏晨阳; 吴景华
Original assignee: 新界泵业集团股份有限公司
Priority date: 2015-10-22
Filing date: 2016-07-20
Publication date: 2017-04-27
Also published as: CN205117810U

Abstract

A runner structure for a vortex pump. Runners are located a pump casing. Each runner is jointly formed by a pump body (1) in the pump casing, impellers (2), and end surfaces of connectors (3). The pump body (1) and connector (3) are connected in a cooperative and stopped manner. The pump body (1) is provided with an axial annular runner (92), and the connector (3) is provided with an axial annular runner (91), and the runners are symmetrical. A joint surface of the two runners and a clearance among the impellers are a same plane. Because the joint surface of the runners and the clearance among the impellers are the same plane, a clearance is generated between an end surface of the pump body and stop end surfaces of the connectors, so that excessive location is avoided, a running clearance is determined by a single pump body, so that the clearance between the impellers can be effectively controlled, and the symmetry and evenness of the runners of the vortex pump are ensured.

Description

Vortex pump flow path structure

Technical field

The utility model belongs to the field of pump structures, in particular to a flow channel structure of a vortex pump.

Background technique

As shown in FIG. 1 and FIG. 2, the existing vortex pump flow passages are generally single-sided flow passages, and the flow passages are located in the pump body, and the cross section of the pump body flow passages is mostly rectangular, and the coupling member 23 and the pump body 21 are matched with each other. 27 is processed into an L-shaped opening, the flow channel joint surface is a non-machined surface 29, the axial asymmetry of the assembly coupling member and the pump body synthesis flow passage, and the pump body and the coupling member stop portion 29 form a convex and concave surface, so that the water flow is Here, turbulence and stagnation are apt to cause energy loss; the tolerance of the gap 2δ of the impeller is the sum of the tolerances of the axial dimension of the pump body and the coupling, respectively, due to the axial depth deviation of the machining body 21 and the coupling member 23 Therefore, the deviation of the gap of the impeller 22 is large, so that the performance deviation of the vortex pump is large.

Summary of the invention

The utility model aims to overcome the above disadvantages and provides a flow passage structure of a vortex pump. An annular flow passage is arranged on the pump body and the coupling member, and a flow passage joint surface of the pump body and the coupling member is arranged on the shaft of the impeller and the coupling member. On the gap surface, the end faces of the flow passages on both sides are not fitted with a gap, and the axial positioning surface of the pump body is also an axially spaced positioning surface of the impeller, and the flow path dividing surface is arranged to ensure the axial depth of the annular flow passage. Uniform and impeller axial clearance control to ensure the hydraulic performance of the vortex pump. The inlet and outlet of the annular flow passage of the pump body are all on the outer circumference and separated by the inner extension tongue. It is convenient to set a circular arc chamfer in the direction of the water outlet of the tongue to reduce the high frequency noise generated by the impact of the high pressure water flow.

The specific technical solution of the utility model is:

The utility model relates to a vortex pump flow passage structure, which is located in a pump casing, wherein the flow passage is arranged in each of the pump body 1, the impeller 2 and the end faces of the coupling member 3, and the pump body is coupled with the joint end of the coupling member. The pump body is provided with an axial annular flow passage 91, and the coupling member is provided with an axial annular flow passage 92, and the two flow passages are symmetrical; the two flow passage joint surfaces and the impeller clearance positioning surface are in the same plane.

Further, an axial joint surface of the flow path end surface 7 of the pump body and the flow path end face 6 of the coupling member is disposed on the axial clearance surface of the impeller 2 and the coupling member 3.

Further, the inlet and outlet of the pump body 1 are disposed on the outer circumference of the annular flow passage 91, and the middle is separated by a tongue partition 10, and the tongue 10 is extended in the circumferential direction, and on the water outlet side 12 of the tongue A circular chamfer 11 is arranged on the outer radial edge of the impeller.

Further, the circumferential width t of the chamfer is 0.1-0.7 times the circumferential width b of the tongue 10.

Further, the annular flow passage 92 of the coupling member 3 is axially extended from the end surface 6 of the coupling member to form an axial annular flow passage, and the flow passage notch corresponding to the radial direction of the two sides of the tongue corresponds to the inlet and outlet.

Compared with the prior art, the beneficial effects of the utility model are:

The flow channel joint surface and the impeller gap positioning surface provided by the utility model have the same plane, and a gap is formed between the pump body end surface 8 and the joint end face 5 of the coupling member to avoid over-positioning, and the running clearance of the impeller is controlled by a single pump body. It is determined that the gap δ of the impeller can be effectively controlled, and the flow passage of the vortex pump is symmetrically uniform. The circumferential extension of the pump body is easy to set a circular chamfer on the outlet side and the outer diameter of the impeller to avoid high pressure. The flow of water constantly hits the pump tongue and produces sharp noise, which reduces the decibel value of the noise by 10% compared to the original technology.

The axial depth of the axial annular flow passage of the coupling member is determined by the end surface of the coupling flow passage, so that the axial depth of the flow passage can be effectively controlled; the flow passage notch on both sides of the tongue is correspondingly corresponding to the inlet and outlet, and the flow passage is increased in and out. The overflow area of the nozzle reduces the flow rate to reduce the loss.

DRAWINGS

1 is a structural view of a prior art vortex pump.

Fig. 2 is a partial enlarged view of Fig. 1;

Figure 3 is a structural view of the vortex pump of the present invention.

Fig. 4 is an enlarged view of an essential part of Fig. 3;

Figure 5 is a structural view of the pump body of the present invention.

Fig. 6 is an enlarged view of an essential part of Fig. 5;

Figure 7 is a structural view of the coupling member of the present invention.

In the figure: 1. pump body, 2. impeller, 3. coupling, 4. motor, 5. coupling end face, 6. coupling flow end face, 7. pump runner end face, 8. pump body end face 9. Radial annular flow passage, 91. Pump axial axial flow passage, 92. Coupling ring axial flow passage, 10. Diaphragm, 11. Spacer chamfer, 12. Water outlet, 13. Inlet.

detailed description

The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings.

Referring to Fig. 1, a vortex pump flow path structure comprises a motor 4, a coupling member 3, a pump body 1, an impeller 2 and a mechanical seal. The coupling member is assembled with the motor as a whole, and the mechanical seal moving ring and the impeller are loaded into the motor shaft extension. The pump body and the coupling member are coupled; the pump body and the coupling member are provided with axial

annular flow passages

91, 92, and the axial joint surface of the synthetic flow passage is disposed on the axial clearance surfaces 6, 7 of the impeller and the coupling member, During the processing of the pump body, the end surface 7 and the size of the pump body flow passage are determined based on the axial bottom surface of the pump body flow passage 91, and the depth dimension of the pump body installation impeller is determined based on the end surface 7 of the pump body flow passage, such that the flow path depth and the impeller The axial double-sided gap 2δ is determined; as shown in Fig. 4, the same coupling member is based on the axial bottom surface of the flow passage 92 to determine the axial dimension of the end face 6 of the pump body flow passage; thus the axial depth of the flow passage of the vortex pump and the impeller shaft The shaft clearance is completely determined, solving the two most important parameters affecting the performance and efficiency of the vortex pump; the uniformity of the flow passage and the axial separation of the impeller are a major breakthrough in the flow structure of the vortex pump.

Referring to Fig. 3, the pump body flow passage tongue 10 is arranged inside, and it is convenient to process a circular chamfer 11 at the water outlet of the tongue. The circular chamfer may be an arc or a chamfer, and the circle of this embodiment The arc chamfer is processed by ¢20 milling cutter, the circumferential width t is 0.3 times of the circumferential width b of the tongue 10, and the position of the nozzle tongue is the highest nip of the impeller vortex, and the chamfering of the tongue can reduce the water flow. The variable force is abruptly generated to generate high-frequency noise; the high-frequency noise of the vortex pump is solved by the inner extension of the pump body and the arc chamfering, and the decibel value of the noise is reduced by 10% compared with the prior art.

The utility model provides a vortex pump flow passage structure, wherein an annular flow passage is arranged on the pump body and the coupling member, and a flow passage joint surface of the pump body and the coupling member is arranged on an axial clearance surface of the impeller and the coupling member, so that two The end surface of the side flow passage has no gap fit, and the axial positioning surface of the pump body is also an axially spaced positioning surface of the impeller. The flow passage structure ensures uniform axial depth of the annular flow passage, and reduces cumulative error to ensure impeller axial direction. The gap ensures the vortex pump and hydraulic performance. The inlet and outlet of the annular flow passage of the pump body are all on the outer circumference and separated by the inner extension tongue. It can conveniently process a circular chamfer at the edge of the tongue outlet to reduce High frequency noise generated by impeller vortex high pressure water flow impact.

The above embodiments are only one embodiment of the present invention, and the description thereof is more specific and detailed, but it is not to be construed as limiting the scope of the present invention. The present invention is applicable to all applications of the vortex pump. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A vortex pump flow passage structure is disposed in a pump casing, wherein the flow passage is an arrangement of each end surface of a pump body (1), an impeller (2) and a coupling member (3) in a pump casing, and the pump body and the pump body The coupling member is cooperatively coupled, the pump body is provided with an axial annular flow passage (91), and the coupling member is provided with an axial annular flow passage (92), wherein the two flow passages are symmetrical; the two flow passages are The joint surface and the impeller gap positioning surface are in the same plane.
A vortex pump flow path structure according to claim 1, wherein an axial joint surface of the flow path end surface (7) of the pump body and the flow path end surface (6) of the coupling member is disposed on the impeller (2) ) with the axial clearance surface of the coupling (3).
A vortex pump flow passage structure according to claim 1, characterized in that the inlet and outlet of the pump body (1) are disposed on the outer circumference of the annular flow passage (91) with the tongue partitioned therebetween ( 10) Separation, characterized in that the tongue (10) is extended in the circumferential direction, and a circular chamfer (11) is arranged on the side of the water outlet side (12) of the tongue and the radial gap of the outer circumference of the impeller.
A vortex pump runner structure according to claim 3, wherein the circumferential width (t) of the chamfer is 0.1-0.7 times the circumferential width (b) of the tongue (10).
A vortex pump flow path structure according to claim 3 or 4, wherein the annular flow passage (92) of the coupling member (3) is axially extended from the end surface (6) of the coupling member to form an axial direction. The annular flow channel has radial flow gaps on both sides of the tongue corresponding to the inlet and outlet.