CN201180648Y - Port plate of vane pump - Google Patents

Abstract

The utility model provides a port plate for vane pumps, which comprises a port plate body, an oil-feeding window, an oil-sucking window and oil-supply troughs connected with the oil-feeding window. The oil-supply troughs are two independent oil-supply troughs. A hole is formed in the port plate body; a valve core and a compression spring are arranged in the hole; one oil chamber communicates with one oil-supply trough, and another oil chamber communicates with the other oil-supply trough. A hole is formed on the valve core and communicates with the central blind hole of the valve core. Central holes are symmetrically formed on the left and the right sides of the valve core and communicate mutually. The port plate retains the property of the conventional vane pump port plate and serves as the valve body of a relief valve to load the relief valve thereon, thereby greatly reducing the compacting force of the vanes and the stator in the low-pressure zone and preventing the stator in the low-pressure zone from being worn excessively. Additionally, the port plate has the advantages of compact and simple structure, easy installation and no influence on the shape and the size of the original vane pump.

Description

The thrust plate of vane pump

Technical field

The utility model relates to the automobile mechanical field, relates in particular to the thrust plate of vane pump.

Background technique

Common vane pump thrust plate function has two: the one, and the high pressure oil by the back leans against on the stator device of thrust plate all the time, forms the volume space of sealing with stator, rotor, blade, side plate; The 2nd, flow: two oil sucking windows and two oily windows of pressure are arranged on the thrust plate, be separately positioned on the position that the enclosed volume space increases and reduces, realize the oil suction and the pressure oil of pump; Also have an annular groove in the position near the blade bottom on the thrust plate, press the high pressure oil of oily window to enter the blade bottom by this groove, making the zone of high pressure of supply pump and the blade bottom of low pressure area all is the same high pressure oils.The over worn reason of common blade pump stator low pressure area that Here it is.

Summary of the invention

The utility model provides the thrust plate of vane pump, has solved over worn problem between the low pressure area blade of original vane pump and the stator.

The technical solution of the utility model is achieved in that the thrust plate of vane pump, comprise the thrust plate body, press oily window, oil sucking window and with the fuel feeding groove of pressing oily window to link to each other, the fuel feeding groove is two fuel feeding grooves independently, porose in the thrust plate body, be provided with spool and pressure spring in the hole, oil pocket communicates with a fuel feeding groove, and another oil pocket communicates with another fuel feeding groove;

Spool is provided with the hole, and the hole communicates with the central blind hole of spool;

The center is the center hole that communicates about spool is provided with.

The beneficial effects of the utility model are: the utility model is on the basis that keeps the common blade thrust plate, utilize the valve body of thrust plate again as reduction valve, reduction valve is set in thrust plate, reduced the impacting force of low pressure area blade and stator significantly, the stator low pressure area just over worn phenomenon can not occur, compact structure, simple, the easy layout do not change the profile and the boundary dimension of former vane pump substantially.

Description of drawings:

Fig. 1 is a front schematic view of the present utility model;

Fig. 2 is a plan view of the present utility model;

Fig. 3 is the A-A generalized section of the utility model reduction valve;

Fig. 4 is the A-A generalized section of the reduction valve of second kind of mode of execution of the utility model.

Part explanation: 1, press oily window, 2, oil sucking window, 3, the fuel feeding groove, 4, the fuel feeding groove, 5, the thrust plate body, 6, spool, 7, pressure spring, 8, oil pocket, 9, oil pocket, 10, center hole, 11, the hole, 12, central blind hole.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described:

Embodiment 1: the thrust plate of vane pump, comprise thrust plate body 5, on position, establish four sections independently fuel feeding grooves 1,3 on the thrust plate body 5 near the blade bottom, be located at zone of high pressure and low pressure area respectively, in the flow disk body, be provided with the hole, be provided with spool 6 and pressure spring 7 in the hole, oil pocket 8 communicates with fuel feeding groove 3, oil pocket 9 communicates with fuel feeding groove 4, and spool 6 is provided with hole 11, and hole 11 communicates with the central blind hole 12 of spool 6.

Thrust plate body 5 from the cylindrical position of thrust plate, processes the valve opening of reduction valve as the valve body of reduction valve, forms a Proprutioning pressure reducing valve together with parts such as spool 6, pressure springs 7 in thrust plate.As the diagram situation of Fig. 3, high pressure oil P1 enters into oil pocket 8 from pressing oily window 1, arrives oil pocket 9 again, and enters into the left end of spool by the hole in the spool 6 11, and the balanced type of this moment is:

$\frac{\mathrm{\π}{d}^2}{4}p1=F$ D-reduction valve spool end diameter p1-presses the pressure F-acting force of the spring of the high pressure oil of hydraulic fluid port introducing to work as $\frac{\mathrm{\π}{d}^2}{4}p1>F$ The time, reduction valve spool 6 moves to right, and throttling narrow slit δ reduces, and the high pressure oil p1 that flows into oil pocket 9 from oil pocket 8 is p2 through decompression behind the δ.The balanced type of this moment is: $\frac{\mathrm{\π}{d}^2}{4}P2=\frac{\mathrm{\π}(D^2-d^2)}{4}p1+F$ Or $p2=\frac{4F}{\mathrm{\π}{D}^2}+\frac{P1(D^2-d^2)}{D^2}$ (D-reduction valve spool Outside diameter P2-is by reduction valve decompression back pressure).

Blade bottom, zone of high pressure is still introduced the high pressure oil P1 that presses oily window and is also supplied with by two sections grooves of zone of high pressure, then reduce to the pressure P 2 of setting by reduction valve by the high pressure oil of pressing oily window to draw at low pressure area, guide to again on two sections grooves of low pressure area, supply with low pressure area blade bottom.

Embodiment 2: as Fig. 4, hole 11 communicates with the center hole 10 of spool 6, and the structural type of its reduction valve is to adopt a Fixed pressure reducing valve, and high pressure oil P1 reduces pressure the back to oil pocket 9 from oil pocket 8 through throttling narrow slit δ, be decompressed to P2 and supply with low pressure area blade bottom, the balanced type of this moment is:

The balanced type of this moment is: $\frac{\mathrm{\π}{D}^2}{4}P2=\frac{\mathrm{\π}{d}^2}{4}P2+F$ Or $p2=\frac{4F}{\mathrm{\π}(D^2-d^2)}.$

Claims (3)

1, the thrust plate of vane pump, comprise thrust plate body (5), press oily window (1), oil sucking window (2) and with the fuel feeding groove of pressing oily window (1) to link to each other, it is characterized in that the fuel feeding groove is independently fuel feeding groove (3), fuel feeding groove (4), porose in the thrust plate body (5), be provided with spool (6) and pressure spring (7) in the hole, oil pocket (8) communicates with fuel feeding groove (3), and oil pocket (9) communicates with fuel feeding groove (4).

2, the thrust plate of vane pump according to claim 1 is characterized in that spool (6) is provided with hole (11), and hole (11) communicate with the central blind hole (12) of spool (6).

3, the thrust plate of vane pump according to claim 1 and 2 is characterized in that the center is the center hole (10) that communicates about spool (6) is provided with.

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