CN205117810U - Volute pump runner structure - Google Patents

Abstract

The utility model belongs to the runner structure of pump structure field, especially a volute pump. This runner is located the pump case, the runner is the setting of the pump body in the pump case, impeller and each terminal surface of connector, the pump body and connector tang cooperation hookup, the pump body is equipped with the axial annular channel on being equipped with axial annular channel, connector, and two runners are symmetrical, two runner composition surfaces and leaf wheel clearance locating surface are the coplanar. The utility model discloses the runner composition surface and the leaf wheel clearance locating surface that set up are the coplanar, and make and produce the clearance between its pump body terminal surface and the connector tang terminal surface, avoid the location, thus the operation clearance of impeller by the single pump body confirm can the effective control impeller clearance delta, the runner symmetry of volute pump evenly obtains guaranteeing simultaneously, inwards stretch in pump body cut water week easily and to set up a circular arc chamfering in the delivery port side with impeller outside diameter edge, avoid high -pressure rivers constantly to clash into the pump tongue and produce sharp -pointed noise, compared with the prior art, the decibel value of noise reduces 10%.

Description

A vortex pump channel structure

technical field

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

Background technique

As shown in Figures 1 and 2, the existing vortex pump flow channels are generally single-sided flow channels, and the flow channels are located in the pump body. The cross-section of the pump body flow channel is mostly rectangular. 27 is processed into an L-shaped spigot, and the flow channel joint surface is a non-machined surface 29. The axial asymmetry of the assembled joint and the synthetic flow channel of the pump body and the pump body and the joint spigot form a convex and concave surface at 29, so that the water flow Here, turbulence and stagnation are easy to occur, resulting in energy loss; the tolerance of the gap 2 δ of the impeller is the sum of the tolerances of the axial dimensions of the pump body and the coupling, because the axial depth dimension of the pump body 21 and the coupling 23 The deviation makes the gap deviation of the impeller 22 larger, so that the performance deviation of the scroll pump is larger.

Contents of the invention

The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a channel structure of a vortex pump. The pump body and the coupling are provided with an annular flow channel, and the flow channel joint surface of the pump body and the coupling is arranged on the shaft between the impeller and the coupling. To the gap surface, make the end faces of the flow channels on both sides fit without gaps. At the same time, the axial positioning surface of the pump body is also the positioning surface of the axial interval of the impeller. This type of flow channel parting surface setting ensures the axial depth of the annular flow channel Uniform and axial clearance control of the impeller, thus ensuring the hydraulic performance of the vortex pump. The water inlet and outlet of the annular flow channel of the pump body are all on the outer circumference, and are separated by an inwardly extending partition tongue, which can conveniently set an arc chamfer in the direction of the water outlet of the partition tongue to reduce the high-frequency noise generated by the impact of high-pressure water flow.

Concrete technical scheme of the present utility model is:

A vortex pump flow path structure, the flow path is located in the pump casing, the flow path is the setting of the end faces of the pump body 1, the impeller 2 and the coupling piece 3 in the pump casing, and the pump body is connected with the notch of the coupling piece , the pump body is provided with an axial annular flow channel 91, and the coupling is provided with an axial annular flow channel 92, and the two flow channels are symmetrical; the joint surface of the two flow channels and the positioning surface of the impeller gap are the same plane.

Further, the axial joint surface of the channel formed by the end face 7 of the flow channel of the pump body and the end face 6 of the coupling piece is set on the axial clearance surface between the impeller 2 and the coupling piece 3 .

Further, the water inlet and outlet of the pump body 1 are all arranged on the outer circumference of the annular flow channel 91, separated by a tongue 10 in the middle, and the tongue 10 is extended inwardly, and the water outlet side 12 of the tongue is connected to An arc chamfer 11 is arranged on the radial gap edge of the outer circle of the impeller.

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

Further, the annular channel 92 of the coupling 3 is axially extended from the end surface 6 of the coupling channel to form an axial annular channel, and radial gaps are arranged on both sides of the partition tongue to correspond to the water inlet and outlet.

Compared with the existing technology, the beneficial effects of the utility model are:

The joint surface of the flow channel and the positioning surface of the impeller gap set by the utility model are the same plane, so that a gap is generated between the end face 8 of the pump body and the end face 5 of the joint stop, avoiding over-positioning, and the running gap of the impeller is controlled by a single pump body It is determined so that the gap δ of the impeller can be effectively controlled, and at the same time, the flow path of the vortex pump is symmetrical and uniform; The water flow continuously hits the pump tongue to produce a sharp noise. Compared with the original technology, the decibel value of the noise is reduced by 10%.

The axial depth of the axial annular channel of the coupling is determined by the end face of the channel of the coupling, so that the axial depth of the channel can be effectively controlled; the gaps of the channel are arranged radially on both sides of the septum to correspond to the water inlet and outlet, increasing the flow in and out of the channel The flow area of the nozzle reduces the flow rate and reduces the loss.

Description of drawings

Fig. 1 is a structural diagram of a vortex pump in the prior art.

FIG. 2 is a partially enlarged view of FIG. 1 .

Fig. 3 is a structural diagram of the vortex pump of the present invention.

FIG. 4 is an enlarged view of an essential part of FIG. 3 .

Fig. 5 is a structural diagram of the pump body of the present invention.

FIG. 6 is an enlarged view of an essential part of FIG. 5 .

Fig. 7 is a structural diagram of the coupling piece of the present invention.

In the figure: 1. Pump body, 2. Impeller, 3. Connecting piece, 4. Motor, 5. End face of connecting piece, 6. End face of connecting piece flow channel, 7. End face of pump body flow channel, 8. End face of pump body , 9. Radial annular flow channel, 91. Axial annular flow channel of the pump body, 92. Axial flow channel of the coupling ring, 10. Spacer tongue, 11. Arc chamfer of spacer tongue, 12. Water outlet, 13. Water inlet.

detailed description

The specific embodiment of the utility model will be further described below in conjunction with the accompanying drawings.

Referring to Fig. 1, a flow path structure of a vortex pump consists of a motor 4, a coupling 3, a pump body 1, an impeller 2 and a mechanical seal. , the pump body is connected with the coupling; the pump body and the coupling are provided with axial annular flow channels 91, 92, and the axial joint surface of the synthetic flow channel is set on the axial gap surfaces 6, 7 of the impeller and the coupling, When the pump body is processed, the axial bottom surface of the pump body flow channel 91 is used as a reference to determine the end face 7 and the size of the pump body flow channel, and then the depth of the impeller installed in the pump body is determined based on the end face 7 of the pump body flow channel. In this way, the depth of the flow channel and the impeller The axial double-sided gap 2 δ is determined; as shown in Figure 4, the same coupling piece is based on the axial bottom surface of the flow channel 92 to determine the axial dimension of the end face 6 of the flow channel of the pump body; the axial depth of the flow channel of the vortex pump and the impeller The axial clearance of the wheel shaft is completely determined, which solves the two most important parameters affecting the performance and efficiency of the vortex pump; the guarantee of the uniform flow channel and the axial spacing of the impeller is a major breakthrough in the flow channel structure of the vortex pump.

Referring to Fig. 3 , the pump body flow channel is provided with an inward extension of the septum tongue 10, and it is convenient to process an arc chamfer 11 at the water outlet of the septum tongue. The arc chamfer can be an arc or a chamfer. The arc chamfering is processed by ￠ 20 milling cutter, the circumferential width t is 0.3 times of the circumferential width b of the tongue 10, the position of the tongue at the water outlet is the highest pressure area of the impeller vortex, setting the arc chamfering of the tongue can reduce the water flow High-frequency noise is generated due to sudden change in force; through the inward extension of the partition tongue of the pump body and the setting of arc chamfering, the common problem of high-frequency noise in the vortex pump is solved. Compared with the original technology, the decibel value of the noise is reduced by 10%.

The utility model provides a flow path structure of a vortex pump, in which an annular flow path is arranged on the pump body and the coupling piece, and the joint surface of the flow path between the pump body and the coupling piece is arranged on the axial clearance surface between the impeller and the coupling piece, so that the two The end faces of the side channels fit together without gaps, and at the same time, the axial positioning surface of the pump body is also the positioning surface of the axial spacing of the impeller. This channel structure ensures that the axial depth of the annular channel is uniform, reduces the cumulative error and ensures that the impeller axial gap, so as to ensure the hydraulic performance of the vortex pump. The water inlet and outlet of the annular flow channel of the pump body are all on the outer circumference, and are separated by an inwardly extending partition tongue. High-frequency noise generated by impeller vortex high-pressure water impact.

The above embodiment is only one implementation of the utility model, and its description is more specific and detailed, but it should not be understood as a limitation of the patent scope of the utility model, and the utility model is applicable to the application of all vortex pumps. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (5)

1. A vortex pump flow path structure, the flow path is located in the pump casing, the flow path is the setting of each end face of the pump body (1), impeller (2) and coupling piece (3) in the pump casing, the pump The pump body is connected with the spigot of the coupling. The pump body is provided with an axial annular flow channel (91), and the coupling is provided with an axial annular flow channel (92). It is characterized in that the two flow channels are symmetrical; the two The joint surface of the runner and the positioning surface of the impeller gap are the same plane. 2. A vortex pump flow channel structure according to claim 1, characterized in that the axial joint surface of the flow channel formed by the end surface of the flow channel of the pump body (7) and the end surface of the flow channel of the coupling piece (6) is set on the impeller (2) On the axial clearance surface of the connector (3). 3. The channel structure of a vortex pump according to claim 1, characterized in that, the water inlet and outlet of the pump body (1) are arranged on the outer circumference of the annular channel (91), and the middle is formed by a tongue The partition (10) is separated, and it is characterized in that: the partition tongue (10) is arranged to extend inward in the circumferential direction, and an arc chamfer (11) is provided on the side of the radial gap between the water outlet side (12) of the partition tongue and the outer circle of the impeller. 4. A vortex pump channel structure according to claim 3, characterized in that the circumferential width (t) of the chamfer is 0.1-0.7 times the circumferential width (b) of the partition tongue (10). 5. A vortex pump flow channel structure according to claim 3 or 4, characterized in that the annular flow channel (92) of the coupling (3) is formed by the axial extension of the end surface (6) of the flow channel of the coupling Axial annular flow channel, flow channel gaps are arranged radially on both sides of the partition tongue to correspond to the water inlet and outlet.