CN1057888A

CN1057888A - Vane pump system

Info

Publication number: CN1057888A
Application number: CN 90103182
Authority: CN
Inventors: 刘金钦
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 1990-06-25
Filing date: 1990-06-25
Publication date: 1992-01-15
Anticipated expiration: 2005-06-25
Also published as: CN1020785C

Abstract

A kind of vane pump system of forming by vane pump, control valve and pressure gauge, control valve is negative opening or the bilateral control three-way valve of zero lap, its import, outlet, control mouth respectively with vane pump pumping cavity, oil sucting cavity, oil suction district root of blade and pressure gauge UNICOM.When induced pressure changed significantly, it is constant that oil suction district root of blade pressure can keep, and can regulate at any time and show, generally has only 4% to 6% of maximum load pressure.This system architecture is simple, good manufacturability, makes easily, and cost is low, has obviously reduced the wearing and tearing of stator surface and vane tip, alleviates blade vibration, has reduced noise.

Description

Vane pump system

The present invention relates to the hydraulic system that hydrovalve and oil hydraulic pump constitute.

Existing vane pump is a vane pump oil suction district root of blade pressure height to the major obstacle of high-pressure trend development, and non-constant, stator inner surface and vane tip serious wear.Though complex master and auxiliary vane pump, pin vane pump reduce oil suction district root of blade pressure by a relatively large margin, but complex structure, the manufacturability of blade and rotor are poor, the required precision height, be difficult to make, and oil suction district root of blade pressure changes with induced pressure, can not keep constant.HUST holds the patent No. be 86203316 " high pressure vane pump " though utility model patent technically than complex master and auxiliary vane pump, pin vane pump advanced person, reduce oil suction district root of blade pressure significantly, also simplified the structure of blade and rotor, but supporting control valve (Auxiliary valves) complex structure, oil suction district root of blade pressure changes with induced pressure, can not keep constant.Control valve is the vane pump of reduction valve, its blade, rotor structure are simple, but compare with above-mentioned three kinds of pumps, the rate gap that reduces oil suction district root of blade pressure is bigger, because reduction valve is the two-way valve of monolateral control, when opening was zero (or negative), the flow by circumferential weld crack in garden between valve body and the guiding valve was still not little and change with induced pressure, and in fact oil suction district root of blade pressure can not keep constant.

Purpose of the present invention has four: the one, and the structure of simplification blade and rotor makes its good manufacturability, makes easily.The 2nd, reduce significantly and constant oil suction district root of blade pressure, reduce the wearing and tearing of vane tip and stator inner surface, alleviate blade vibration, reduce noise, can adapt to the impact load operating mode especially.The 3rd, the designs simplification of control valve, good manufacturability is made easily.The 4th, keep sufficiently high volumetric efficiency.

Vane pump system of the present invention is made up of vane pump, control valve and pressure gauge.Vane pump comprises pump cover, side plate, stator, blade, rotor, pressure side plate, the pump housing, main shaft, between main shaft and the pressure side plate endoporus first gap is arranged, between main shaft upper spline and the rotor splined hole second gap is arranged, between main shaft and the side plate third space is arranged, above-mentioned three gaps communicate with one another, and communicate with the lip-type packing inboard with axle.The stator transition curve is low noise correction equation of higher degree curve.Blade is single blade structure.Two sections oil suction district kidney slots and two sections laminated oil zone kidney slots are arranged respectively on side plate or the pressure side plate end face, and oil suction district kidney slot communicates with the root of blade that is in the oil suction district, and the laminated oil zone kidney slot communicates with the root of blade that is in laminated oil zone.Interval between oil suction district kidney slot and the laminated oil zone kidney slot is less than the Circularhole diameter of rotor upper blade groove root.Two oil suction slotted eyes UNICOM's two sections oil suction districts kidney slot is respectively arranged on side plate or the pressure side plate.The high pressure slotted eye that communicates with pumping cavity is arranged on the pump housing or the pump cover, the low pressure slotted eye that communicates with oil suction district root of blade is arranged, the zero-pressure slotted eye that communicates with oil sucting cavity is arranged.Control valve is made up of valve body, guiding valve, spring, piston, adjusting screw, sealing limit plug for negative opening or the bilateral control three-way valve of zero lap.Valve body is a hollow cylindrical, and inwall has import circular groove, outlet circular groove, respectively with valve body on the import, outlet that have and control mouthful communicate.Guiding valve has the cylindric of annular groove for the surface, the two ends diameter is different, its upper diameter is less than lower diameter, inside is provided with axial damping hole UNICOM control valve chamber, upper end and chamber, lower end, and communicate by annular groove under the radial hole, the annular groove width is less than or equal to the distance between outlet circular groove and the import circular groove.When guiding valve top (small end) had spring, guiding valve to be in the upper end limit position, chamber, lower end and import kept cutting off, and outlet is with annular groove UNICOM or keep critical connection.When guiding valve was in the lower end limit position, the chamber, upper end keep to cut off with outlet, import and annular groove UNICOM or keep critical connection.Vane pump high pressure slotted eye and control valve import UNICOM, low pressure slotted eye and control valve control mouth and pressure gauge UNICOM, zero-pressure slotted eye and control valve outlet UNICOM.

The setting pressure value is determined by the decrement of giving that adjusting screw changes spring, show by pressure gauge, be generally 4% to 6% of maximum load pressure, the bilateral opening amount of deviation feedback control valve of oil suction district root of blade force value (i.e. the oil liquid pressure value of control mouth) and setting pressure value.Oil suction district root of blade force value is during greater than the setting pressure value, pressure spring, and guiding valve is moved upward, be that the inlet openings amount reduces, inlet flow rate reduces, and the exit opening amount increases, rate of discharge increases, and oil suction district root of blade force value trend setting pressure value direction changes.Otherwise, analogize, so control valve had both played decompression, play the constant voltage effect again.

Vane pump system of the present invention can be regulated oil suction district root of blade pressure, realizes the little and constant purpose of oil suction district's root of blade pressure.System's each several part is simple in structure, and good manufacturability make easily, thereby cost is low.Native system is applicable to the high-pressure and hydraulic transmission system, is specially adapted to the Hydraulic Power Transmission System of impact load operating mode, still has enough volumetric efficiencies when light viscosity oil and high water base medium are used in repacking a little.

Accompanying drawings embodiments of the invention: Fig. 1 is for having the vane pump system longitudinal sectional view of high pressure slotted eye, low pressure slotted eye and zero-pressure slotted eye on the pump housing, Fig. 2 is the vane pump transverse sectional view of cutting open along B-B line among Fig. 1.Vane pump comprises pump cover (8), side plate (9), stator (10), blade (11), rotor (12), pressure side plate (15), the pump housing (17), main shaft (18), first gap (16), second gap (6), third space (7), axle lip-type packing (19) among the figure.Two sections oil suction district kidney slots (13) and two sections laminated oil zone kidney slots (22) on pressure side plate (15) end face, the release slotted eye (23) that is communicated with first gap (16) and oil sucting cavity on the pressure side plate, circular groove (5) is arranged on the pressure side plate, also have two oil suction slotted eyes (14) to make two sections oil suction district kidney slots (13) and circular groove (5) UNICOM respectively.Have low pressure slotted eye (3), high pressure slotted eye (4), zero-pressure slotted eye (2) on the pump housing (17), communicate with circular groove (5), pumping cavity, first gap (16) respectively.Annular seal groove (24) is arranged on the pump housing inwall.Control valve is made up of valve body (29), guiding valve (42), spring (26), piston (34), " O " shape seal ring (27), adjusting screw (28), sealing limit plug (32), back-up ring (33), and valve interior wall import circular groove (40), outlet circular groove (35), control mouthful circular groove (38) communicate with import (20), outlet (21) and control mouthful (25) respectively.Guiding valve upper diameter (φ N) is less than lower diameter (φ M), and there is annular groove (39) on the surface, internally-damped aperture (36) UNICOM control valve chamber (30), upper end and chamber, lower end (41), and inside also has radial hole (37).Pressure gauge (1) and control mouthful (25) UNICOM.Import (20), outlet (21), control mouthful (25) respectively with high pressure slotted eye (4), zero-pressure slotted eye (2), low pressure slotted eye (3) UNICOM.

Fig. 3 is the side plate plan view, and Fig. 4 is the pump cover plan view, and they have shown a kind of enforcement state that has high pressure slotted eye (4), low pressure slotted eye (3) and zero-pressure slotted eye (2) on the pump cover.Two sections oil suction district kidney slots (13) and two sections laminated oil zone kidney slots (22) are arranged on Fig. 3 latus inframedium (9), and oil suction slotted eye (14) UNICOM's oil suction district kidney slot (13) also has pressure oil groove hole (44) UNICOM pumping cavity.Have low pressure slotted eye (3), high pressure slotted eye (4), zero-pressure slotted eye (2) on the pump cover among Fig. 4 (8), communicate with oil suction slotted eye (14), pressure oil groove hole (44), oil sucting cavity among Fig. 3 respectively.Control valve can connect the same Fig. 1 of concrete structure from the pump cover direction.

Claims

1, a kind of by vane pump, the vane pump system that control valve and pressure gauge are formed, described vane pump comprises pump cover [8], side plate [9], stator [10], blade [11], rotor [12], pressure side plate [15], the pump housing [17] and main shaft [18], has first gap [16] between main shaft [18] and pressure side plate [15] endoporus, on side plate [9] or pressure side plate [15] end face two sections oil suction district kidney slots [13] and two sections laminated oil zone kidney slots [22] are arranged respectively, interval between oil suction district kidney slot and the laminated oil zone kidney slot is less than the Circularhole diameter of rotor [12] upper blade groove root, of the present invention being characterized as:

(1) control valve is negative opening or the bilateral control three-way valve of zero lap, has import [20], outlet [21] and control mouthful [25] on the valve body [29],

(2) have on the pump housing [17] or the pump cover [8] the high pressure slotted eye [4] that communicates with pumping cavity, the low pressure slotted eye [3] that communicates with oil suction district root of blade is arranged, the zero-pressure slotted eye [2] that communicates with oil sucting cavity is arranged,

(3) described high pressure slotted eye and control valve import [20] UNICOM, low pressure slotted eye and control valve control mouthful [25] and pressure gauge [1] UNICOM, zero-pressure slotted eye and control valve outlet [21] UNICOM.

2, vane pump system as claimed in claim 1, described control valve is made up of valve body (29), guiding valve (42), spring (26), piston (34), adjusting screw (28), sealing limit plug (32), it is characterized by:

(1) valve body (29) is a hollow cylindrical, and inwall has import circular groove (40), outlet circular groove (35), control mouthful circular groove (38), communicate with import (20), outlet (21) and control mouthful (25) respectively,

(2) guiding valve (42) has the cylindric of annular groove (39) for the surface, its upper diameter (φ N) is less than lower diameter (φ M), inner shaft is to damping hole (36) UNICOM control valve chamber (30), upper end and chamber, lower end (41), and communicate with annular groove (39) by radial hole (37)

(3) described annular groove (39) width is less than or equal to the distance between outlet circular groove and the import circular groove,

When (4) guiding valve (42) was in the upper end limit position, chamber, lower end (41) kept cutting off with import (20), and outlet (21) is with annular groove (39) UNICOM or keep critical connection,

When (5) guiding valve (42) was in the lower end limit position, chamber, upper end (30) kept cutting off with outlet (21), and import (20) is with annular groove (39) UNICOM or keep critical connection.

3, vane pump system as claimed in claim 1 or 2, it is characterized by the release slotted eye (23) that is communicated with first gap (16) and oil sucting cavity is arranged on the pressure side plate (15) of described vane pump, circular groove (5) is arranged on the pressure side plate, also have two oil suction slotted eyes (14), make two sections oil suction district kidney slots (13) and circular groove UNICOM respectively, have low pressure slotted eye (3), high pressure slotted eye (4), zero-pressure slotted eye (2) on the pump housing (17), communicate with circular groove (5), pumping cavity, first gap (16) respectively.

4, vane pump system as claimed in claim 1 or 2, it is characterized by on the side plate (9) of described vane pump and have oil suction slotted eye (14), UNICOM oil suction district kidney slot (13), also have pressure oil groove hole (44), UNICOM's pumping cavity, have low pressure slotted eye (3), high pressure slotted eye (4), zero-pressure slotted eye (2) on the pump cover (8), communicate with described oil suction slotted eye (14), pressure oil groove hole (44), oil sucting cavity respectively.