CN101265912A - Double-acting rotor pump with double-channel stator - Google Patents

Abstract

The invention relates to a double-channel stator for a double-acting rotor pump. The stator adopts an inner and outer double-layer structure, and the outer layer of the stator is provided with two sets of center-symmetric outer inlets and two center-symmetric outer outlets. Each group of outer inlets and each group of outer outlets are evenly distributed at intervals on the outer circumference of the stator, and the inner layer of the stator is provided with an inner inlet corresponding to and communicating with the outer inlets and an inner inlet connected with the outer The outlet corresponds to and communicates with the inner outlet, the area of the inner inlet is larger than that of the outer inlet, and the area of the inner outlet is larger than the outer outlet. The beneficial effects of the present invention are: (1) the flow area of the inlet is increased, thereby reducing the flow velocity of the conveying medium, improving the cavitation performance of the pump, and reducing the hydraulic loss of the medium; (2) reducing the outlet resistance of the conveying process, improving delivery efficiency.

Description

Double-acting rotor pump with double-channel stator

technical field

The invention relates to a stator for a volumetric double-acting rotor pump.

Background technique

The rotor of the volumetric double-acting rotor pump completes two oil suctions and two oil pressures per revolution. The double-acting vane pump is used as an example to illustrate the working principle of the double-acting rotor pump: as shown in Figure 1 and Figure 2. Among them, 4-stator, 5-rotor, 6-channel, 7-pump body, the stator and rotor are concentric, the stator is a single-layer structure, and its inner surface consists of two large-radius arcs, two small-radius arcs and four transition curves Composition, two oil suction ports a and two oil pressure ports b are arranged diagonally on the stator, and passages connecting the oil inlet and oil outlet with the oil suction ports and oil pressure ports on the stator are provided in the housing. When the rotor rotates clockwise, the blades at the upper left and lower right corners move from r to R, and the closed volume between the two blades gradually increases to form a partial vacuum, and oil is sucked through the two oil suction ports; at the lower left and upper right corners The vane at the position moves from R to r, the closed volume between the two vanes gradually decreases, and the oil is pressed through the two oil pressure ports.

It can be seen that the double-acting rotor pump requires the stator to have a double-inlet and double-outlet dual-channel structure. However, the stator of the traditional double-acting rotor pump is mostly a single-layer structure. The outer surface and the inner surface of the stator are formed by openings with the same shape and size. Oil suction port or oil outlet port. Since the internal and external dimensions of the opening are the same, it cannot alleviate the import and export resistance. The resistance at the entrance is large, the flow rate is high, the transport medium is prone to cavitation, the hydraulic loss is large, and the resistance at the exit is also large, and the medium transmission efficiency is not high.

Contents of the invention

In order to overcome the above shortcomings of the traditional double-acting rotor pump stator, the present invention provides a double-acting rotor pump stator with large flow area, low flow rate, small hydraulic loss, good cavitation performance and high efficiency.

The present invention adopts following technical scheme:

A double-channel stator for a double-acting rotor pump, the stator adopts an inner and outer double-layer structure, and the outer layer of the stator is provided with two sets of center-symmetrical outer inlets and two center-symmetrical outer outlets, each of the The outer inlets of the group and the outer outlets of each group are evenly distributed on the outer circumference of the stator, and the inner layer of the stator is provided with an inner inlet corresponding to and communicating with the outer inlet and an inner inlet corresponding to the outer outlet. A connected inner outlet, the area of the inner inlet is larger than the outer inlet, and the area of the inner outlet is larger than the outer outlet.

Further, each group of outer inlets has only one main outer inlet, each group of inner inlets includes a main inner inlet and an auxiliary inner inlet, and the main inner inlet and the main outer inlet are on the same radial direction, The auxiliary internal entrance is arranged on both sides of the main internal entrance.

Further, each set of outer outlets includes two main outer outlets, and the two main outer outlets are symmetrically distributed along the central cross-section of the stator, and each set of inner outlets includes a main inner outlet and an auxiliary inner outlet, so The two main internal outlets are distributed symmetrically along the central cross-section of the stator, and the auxiliary internal outlets are arranged in the middle of the two main internal outlets.

Preferably, the area of the main inner entrance is larger than that of the main outer entrance.

Preferably, the area of the main inner outlet is larger than that of the main outer outlet.

Further, reinforcing ribs are connected between the inner layer and the outer layer of the stator.

The technical idea of the present invention is: the stator is designed as an inner and outer double-layer mechanism, and the area of the inner inlet of the inner layer is larger than the outer inlet of the outer layer, so that the flow area of the inlet is increased, thereby reducing the inlet flow rate of the medium and improving The cavitation performance of the pump also reduces the hydraulic loss of the suction medium; and the area of the inner outlet is designed to be larger than the outer outlet. By increasing the outlet area of the medium, the outlet resistance during the transportation process can be reduced and the transportation efficiency can be improved.

The beneficial effects of the present invention are: (1) the flow area of the inlet is increased, thereby reducing the flow velocity of the conveying medium, improving the cavitation performance of the pump, and reducing the hydraulic loss of the medium; (2) reducing the outlet resistance of the conveying process, improving delivery efficiency.

Description of drawings

Figure 1 is a schematic diagram of the principle of a traditional double-acting vane pump.

Fig. 2 is a schematic diagram of the oil circuit of a traditional double-acting vane pump.

Fig. 3 is a half-cut perspective view of a double-channel stator for a double-acting rotor pump.

Fig. 4 is a cross-sectional view of a double-channel stator for a double-acting rotor pump.

Fig. 5 is a sectional view of A-A of Fig. 4 .

Fig. 6 is a working diagram of the double-acting rotor pump of the present invention.

Detailed ways

See Figure 1-6: A double-channel stator for a double-acting rotor pump, the stator adopts an inner and outer double-layer structure, and the outer layer 1 of the stator is provided with two sets of centrally symmetrical outer inlets A and two centrally symmetrical A group of external outlets B, each group of external inlets A and each group of external outlets C are evenly distributed at intervals on the outer circumference of the stator, and the inner layer 2 of the stator is provided with The connected inner inlet B and the inner outlet D corresponding to and connected with the outer outlet C, the area of the inner inlet B is larger than the outer inlet A, and the area of the inner outlet D is larger than the outer outlet C.

Each set of external entrances A is composed of only one main external entrance A1, each set of internal entrances B includes a main internal entrance B1 and an auxiliary internal entrance B2, and the main internal entrance B1 and the main external entrance A1 is on the same radial direction, and the auxiliary internal inlet B2 is arranged on both sides of the main internal inlet B1. The area of the main inner entrance B1 is larger than the main outer entrance A1.

Each group of outer outlets C includes two main outer outlets C1, and the two main outer outlets C1 are symmetrically distributed along the central cross section of the stator. Each group of inner outlets D includes main inner outlets D1 and auxiliary inner outlets. Outlet D2, the two main internal outlets D1 are distributed symmetrically along the central cross-section of the stator, and the auxiliary internal outlet is arranged in the middle of the two main internal outlets.

The main inner outlet D1 is on the same radial direction as the main outer outlet C1, and the auxiliary inner outlet D2 is arranged in the middle of the two main inner outlets D1. The area of the main inner outlet D1 is larger than that of the main outer outlet C1.

A reinforcing rib 3 is connected between the inner layer 2 and the outer layer 1 of the stator. Connecting the reinforcing rib 3 between the inner layer and the outer layer of the stator can improve the strength and stability of the stator.

The present invention moderately increases the wall thickness of the stator, and designs the stator as an inner and outer double-layer mechanism. The outer inlet A and the outer outlet C are arranged on the outer layer 1, and each group of outer inlets A has only one main outer inlet A1, and each group of outer inlets A on the inner layer 2 The group inner inlet B is composed of a main inner inlet B1 and two auxiliary inner inlets B2, and there are passages between the main outer inlet A1 and each main inner inlet B1 and auxiliary inner inlet B2, so that the fluid medium flows from the main outer inlet After inflow, part of it flows into the cavity from the main inner inlet B1, and the other part flows into the cavity from the auxiliary inner inlet B2, so the inlet cross-sectional area is increased, the inlet flow rate of the medium is reduced, the delivery speed of the medium in the pump is reduced, and the cavitation of the pump Enhanced performance with reduced media flow rate reduces hydraulic loss of suction media. On the other hand, each group of outer outlets C on the outer layer 1 includes two main outer outlets C1, and on the inner layer 2, in addition to the main inner outlet D1 corresponding to the main outer outlet C1, there are also two main inner outlets D1 An auxiliary inner outlet D2 is added, so that the outlet area of the medium in the inner layer of the stator increases, which can reduce the outlet resistance in the conveying process and improve the conveying efficiency.

Claims (6)

1, a kind of double-acting rotor pump double flow stator, it is characterized in that: outer double-layer structure in described stator adopts, the skin of described stator is provided with centrosymmetric two groups of outer inlets and centrosymmetric two groups of outer vents, described every group of outer inlet evenly distributes on the excircle of stator at intervals with every group of outer vent, the internal layer of described stator is provided with interior inlet and inner outlet corresponding with described outer vent and that be communicated with corresponding with described outer inlet and that be communicated with, the area of inlet is greater than outer inlet in described, and the area of described inner outlet is greater than described outer vent.

2, double-acting rotor pump double flow stator as claimed in claim 1, it is characterized in that: described every group of outer inlet only has a master to enter the mouth outward, inlet comprises inlet and auxilliary interior inlet in the master in described every group, inlet enters the mouth outward in same footpath upwards with described master in the described master, and inlet is arranged on the both sides of inlet in the described master in described the assisting.

3, double-acting rotor pump double flow stator as claimed in claim 1 or 2, it is characterized in that: described every group of outer vent comprises two main outer vents, described two main outer vents are symmetrically distributed along the center cross-sectional of stator, described every group of inner outlet comprises main inner outlet and auxilliary inner outlet, described two main inner outlets are symmetrically distributed along the center cross-sectional of stator, and described auxilliary inner outlet is arranged on the neutral position of two main inner outlets.

4, double-acting rotor pump double flow stator as claimed in claim 2 is characterized in that: the area of inlet enters the mouth outward greater than described master in the described master.

5, double-acting rotor pump double flow stator as claimed in claim 3 is characterized in that: the area of described main inner outlet is greater than described main outer vent.

6, double-acting rotor pump double flow stator as claimed in claim 3 is characterized in that: be connected with stiffening rib between the internal layer of described stator and the skin.

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