Axial force self-balancing type double-vane pump impeller structure

Abstract

The invention provides an axial force self-balancing type double-vane pump impeller structure, and particularly relates to the technical field of horizontal type double-suction centrifugal pump structures. An axial force self-balancing type double-vane pump impeller structure comprises a double-vane pump structure, a rotating shaft and double-end bolts, the double-vane pump structure comprises a double-impeller structure, leakage stopping rings are arranged at the four corners of the impeller structure, the rotating shaft is fixedly arranged in the center of the impeller structure, and the double-end bolts are arranged at the two ends of the rotating shaft. The double-vane pump has the beneficial effects that axial force control and adjustment can be achieved, the gap between the leakage stopping ring and the double-vane pump structure can be achieved, axial displacement can be monitored, if the double-vane pump structure moves towards the left side, the gap between the end face I and the end face II of the left leakage stopping ring is reduced, the pressure of the end face I and the end face II of the left leakage stopping ring can be increased, and the leakage stopping effect is improved. And the pressure of the end face I and the end face II of the anti-leakage ring on the opposite side can be reduced, so that axial force self-balancing can be achieved, and the axial force self-balancing effect is achieved.

Description

Technical Field

[0001] The invention mainly relates to the technical field of horizontal double-suction centrifugal pump structures, and in particular to an axial force self-balancing double-blade pump impeller structure. Background Art

[0002] The horizontal double-suction centrifugal pump is the most widely used pump. During the operation of its impeller, bearing problems are the most common. The reason is that the bearing should not bear axial force, but due to the asymmetry of the inlet and outlet water flow channels, the runner, and the leak-proof ring during manufacturing and installation, or hydraulic shocks on the inlet and outlet sides, problems with the thrust bearing occur. In actual use, the L-type leak-proof ring is better than the straight seam type, but its disadvantage is that the leaked water flows directly to the blade inlet. Therefore, the present invention provides an axial force self-balancing double-leak pump impeller structure. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, the present invention provides an axial force self-balancing double-blade pump impeller structure.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0005] An axial force self-balancing double-leaf pump impeller structure includes a double-leaf pump structure, a rotating shaft and stud bolts. The double-leaf pump structure includes a double impeller structure. Leak-proof rings are arranged on the four corners of the impeller structure. The rotating shaft is fixedly arranged in the center of the impeller structure. Stud bolts are arranged on both ends of the rotating shaft.

[0006] The I end surface clearance of the double impeller structure is smaller than the II end surface clearance of the leak-proof ring.

[0007] Compared with the prior art, the beneficial effects of the present invention are:

[0008] The present invention can realize axial force control and regulation. The gap between the leak-proof ring and the double-impeller pump structure can monitor the axial displacement. If the double-impeller structure moves to the left, the gap between the end faces I and II of the leak-proof ring on the left side will be reduced, which can increase the pressure on the end faces I and II of the leak-proof ring on the left side. On the contrary, the pressure on the end faces I and II of the leak-proof ring on the other side will be reduced, thereby realizing axial force self-balancing, which has the axial force self-balancing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention.

[0010] The numbers shown in the accompanying drawings are: 1, double-leaf pump structure; 2, rotating shaft; 3, stud bolt; 4, double-impeller structure; 5, leak-proof ring; 6, end face I; 7, end face II. DETAILED DESCRIPTION

[0011] The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the application.

[0012] like Figure 1 As shown, an axial force self-balancing double-leaf pump impeller structure includes a double-leaf pump structure 1, a rotating shaft 2 and stud bolts 3. The double-leaf pump structure 1 includes a double impeller structure 4. Leak-proof rings 5 ​​are arranged on the four corners of the impeller structure 4. The center of the impeller structure 4 is fixedly arranged on the rotating shaft 2. Stud bolts 3 are arranged on both ends of the rotating shaft 2. The double-leaf pump structure is a symmetrically arranged impeller pump device.

[0013] Furthermore, the gap between the I end surface 6 of the double impeller structure 4 is smaller than the gap between the II end surface 7 of the leak-proof ring 5 .

[0014] Working principle:

[0015] The leak-proof ring can further reduce the leakage. The size of the gap between the I and II end faces corresponds to the size of the leakage. At the same time, the leak-proof ring has the effect of axial force self-balancing. If the double impeller structure is Figure 1 As shown in the figure, if it moves to the left, the gap between the end faces of the left stop ring I and II will be reduced, which can increase the end face pressure of the left stop ring. On the contrary, the end face pressure on the other side will be reduced.

[0016] 1. Assuming that the axial force of the double impeller structure is to the left, the double impeller structure will move to the left, the gap between the end faces of the left stop ring I and II will decrease, the leakage will decrease, and the pressure between the end faces of the left stop ring I and II will increase. The opposite is true for the right stop ring. The pressure between the end faces of the stop ring I and II will decrease, generating an axial force in the right direction, and finally forming an axial force balance.

[0017] 2. Assuming that the axial force of the double impeller structure is to the right, the double impeller structure will move to the right, the gap between the end faces of the right stop-leak ring I and II will decrease, the leakage will decrease, and the pressure between the end faces of the right stop-leak ring I and II will increase. The opposite is true for the left stop-leak ring, the pressure on the inlet end face will decrease, generating an axial force in the left direction, and finally forming an axial force balance.

Claims

1. An axial force self-balancing double-leaf pump impeller structure, comprising a double-leaf pump structure (1), a rotating shaft (2) and a stud bolt (3), characterized in that: The double-blade pump structure (1) comprises a double impeller structure (4), leak-proof rings (5) are arranged at the four corners of the impeller structure (4), the center of the impeller structure (4) is fixedly arranged on the rotating shaft (2), and stud bolts (3) are arranged at both ends of the rotating shaft (2).

2. The axial force self-balancing double-blade pump impeller structure according to claim 1 is characterized in that: The clearance of the I end surface (6) of the double impeller structure (4) is smaller than the clearance of the II end surface (7) of the leak-proof ring (5).

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