KR101744690B1 - Variable vane oil pump for powersteering and automatic transmission of vehicle - Google Patents

Variable vane oil pump for powersteering and automatic transmission of vehicle Download PDF

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Publication number
KR101744690B1
KR101744690B1 KR1020150124593A KR20150124593A KR101744690B1 KR 101744690 B1 KR101744690 B1 KR 101744690B1 KR 1020150124593 A KR1020150124593 A KR 1020150124593A KR 20150124593 A KR20150124593 A KR 20150124593A KR 101744690 B1 KR101744690 B1 KR 101744690B1
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KR
South Korea
Prior art keywords
cylinder ring
valve
pressure
pressure chamber
guide member
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KR1020150124593A
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Korean (ko)
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KR20170027953A (en
Inventor
조봉현
조영준
조영진
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조봉현
조영준
조영진
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Priority to KR1020150124593A priority Critical patent/KR101744690B1/en
Publication of KR20170027953A publication Critical patent/KR20170027953A/en
Application granted granted Critical
Publication of KR101744690B1 publication Critical patent/KR101744690B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/062—Details, component parts
    • B62D5/064—Pump driven independently from vehicle engine, e.g. electric driven pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C2/3441—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0436—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/20—Fluid liquid, i.e. incompressible
    • F04C2210/206—Oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/58—Valve parameters

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)

Abstract

An object of the present invention is to provide a variable vane oil pump for an automotive power steering and a variable vane pump for an automatic transmission that can vary the capacity per revolution of the variable vane pump by adjusting the eccentric distance of the cylinder ring.
In order to achieve the above object, a variable vane oil pump for an automotive power steering and automatic transmission according to the present invention is integrally connected to a rotor shaft (131) in a body (140) and includes a plurality of vane grooves A rotor 130 in which a vane 150 for linear motion is inserted; A cylinder ring 160 formed to surround the outer circumference of the rotor 130 so as to be eccentric and rotated by a frictional force in contact with the tip of the vane 150 and eccentrically installed with a sliding tolerance; On one side of the outer circumferential surface of the cylinder ring 160, a third elastic member support guide 600 configured to support the cylinder ring 160 to maintain the eccentricity; And a control valve 300 for supporting the cylinder ring 160 on the other side of the outer circumferential surface of the cylinder ring 160. The control valve 300 moves horizontally A first valve cap (330) covering the side wall, and a second valve cap (330) covering one side of the valve piston (410) in the side wall A second pressure chamber 310 located on the other side of the valve piston 410 of the side wall ship and a second pressure chamber 310 located on the side wall of the side wall of the valve chamber, And the valve piston 410 moves due to a pressure difference between the first pressure chamber 200 and the second pressure chamber 310. [

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a variable vane oil pump for a vehicle power steering and an automatic transmission,

The present invention relates to an automotive variable vane oil pump, and more particularly, to a variable vane oil pump for an automobile power steering and automatic transmission that adjusts the eccentric distance of a cylinder by a small amount, a large amount, Oil pump.

1, a rotor 22 is fixed to a rotary shaft 13, and a cylinder ring 21 having a circular shape is provided on the outer side of the rotor 22 in an eccentric manner. In order to maintain this eccentricity, the support piston 37 supports the cylinder ring 21 on the outer surface of the cylinder ring 21, the support piston 37 is supported by the pressure reducing valve 31, and the first elastic member 36 Is provided so as to support the pressure reducing valve 31. A first pressure chamber 32 in which the oil discharged from the pump directly acts is formed in one side of the interior of the pressure reducing valve 31 and a second pressure chamber 32 in which the oil passed through the orifice pipe 47 2 pressure chamber 33 is formed.

When the rotor 22 fixed to the rotating shaft 13 rotates, a plurality of vanes 23 inserted in the vane groove 23a protrude to the outside by the centrifugal force, and the inner surface of the cylinder ring 21 is pressed And is rotated with a sliding friction force. The outer surface of the cylinder ring (21) is installed so as to be able to rotate with a sliding friction with the metal bearing (20). A support piston 37 for pushing the metal bearing 20 is provided so that the cylinder ring 21 can be formed eccentrically with the rotor 22 and the support piston 37 is supported by the pressure reducing valve 31 do.

The pressure reducing valve 31 is supported by a first elastic member 36 and a relief valve 48 for controlling a set maximum pressure is formed in the pressure reducing valve 31. A first pressure chamber 32 in which oil discharged from a pump (not shown) directly acts is formed on one side of the inside of the pressure reducing valve 31, and a second pressure chamber 32 in which the oil passing through the orifice pipe 47 acts is formed. And a seal 33 is provided. When the vehicle is operating at high speed, the pump will discharge a lot of oil. When the oil thus increased passes through the discharge port 35, the frictional pressure becomes high and a pressure difference occurs between the first pressure chamber 32 and the second pressure chamber 33 of the pressure reducing valve 31. When the pressure difference of the pressure reducing valve 31 is larger than the pressure of the first elastic member 36, the pressure reducing piston 45 moves in the direction of the second pressure chamber 33. The amount of eccentricity of the cylinder ring (21) is reduced by the movement of the pressure reducing piston (45). Due to the reduced eccentricity, the area of the sucking and sucking chamber becomes smaller and the area of the wish-to-pressurizing chamber becomes larger. Thereby, a variable vane pump capable of changing the pump capacity per revolution is provided.

However, if such an existing variable vane pump is pressurized by an external operating mechanism, if the eccentric sectional area pressure of the inner circumferential surface of the cylinder where the pressure acts in the pump compression chamber becomes equal to the pressure of the first pressure chamber and the second pressure chamber, There is a problem in that the required capacity can not be maintained because the cylinder ring is not fixed in place.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a control valve for controlling the internal pressure of the pump and the cylinder ring, And a variable vane oil pump for an automotive power steering and automatic transmission capable of discharging a stable flow rate with fixed cylinder rings even when the pressure becomes the same.

To achieve the above object, a guide member according to the present invention includes: a guide body having an upper U-shaped concave portion and having a through hole penetrating the upper portion and the lower portion; And a tapered taper nut 403 screwed to the end of the adjusting bolt which is inserted through the through hole.

The variable vane oil pump for an automotive power steering and automatic transmission according to the present invention is integrally connected to a rotor shaft 131 in a body 140 and is integrally connected to a plurality of vane grooves distributed in a direction, A rotor 130 in which a vane 150 is inserted; A cylinder ring 160 formed to surround the outer circumference of the rotor 130 so as to be eccentric and rotated by a frictional force in contact with the tip of the vane 150 and eccentrically installed with a sliding tolerance; On one side of the outer circumferential surface of the cylinder ring 160, a third elastic member support guide 600 configured to support the cylinder ring 160 to maintain the eccentricity; And a control valve 300 for supporting the cylinder ring 160 on the other side of the outer circumferential surface of the cylinder ring 160. The control valve 300 moves horizontally A first valve cap (330) covering the side wall, and a second valve cap (330) covering one side of the valve piston (410) in the side wall A second pressure chamber 310 located on the other side of the valve piston 410 of the side wall ship and a second pressure chamber 310 located on the side wall of the side wall of the valve chamber, And the valve piston 410 moves due to a pressure difference between the first pressure chamber 200 and the second pressure chamber 310. [

Further, the variable vane oil pump for an automotive power steering and automatic transmission according to the present invention includes: a guide body 401 having a U-shaped concave portion at an upper portion and having a through hole penetrating upper and lower portions; An adjusting bolt (402) for penetrating and connecting the through hole from the bottom; And one end of the valve piston 410 having the through-hole formed therein is inserted into the U-shaped recess so as to correspond to the through-hole of the guide body 401, And a taper nut (403) having a tapered shape screwed to an end portion of the guide member (400), wherein the U-shaped concave portion of the guide member (400) is connected to one side of the valve piston The guide member 400 is moved in the guide member moving space 500 formed at a central portion of the control valve 300 in a direction perpendicular to the control valve 300 by the movement of the valve piston 410, Thereby supporting and moving the cylinder ring 160.

In the variable vane oil pump for an automotive power steering and automatic transmission according to the present invention, a lower portion of the guide body 401 of the guide member 400 is formed by a slope forming an inclined angle to move the cylinder ring 160 .

In the variable vane oil pump for an automotive power steering and automatic transmission according to the present invention, when the cylinder 160 is moved to the guide member 400 having the inclined angle, the pressure chambers 910, Thereby relieving the eccentric load from acting on the upper and lower diagonal lines of the valve piston 410.

The variable vane oil pump for an automotive power steering and automatic transmission according to the present invention is characterized in that a force for moving the valve piston 410 by a pressure generated in the guide member 400 due to eccentricity of the cylinder ring 160 The guide member 400, the guide member moving space 500, and the body 140 are bent so as to be dispersed and controlled.

As described above, according to the present invention described above, the eccentric distance of the cylinder is increased to increase the eccentric distance of the cylinder, and the oil capacity per rotation of the pump is increased or decreased while the eccentric distance of the cylinder ring is increased, It is effective to reduce the noise and to reduce the power for driving the pump, thereby improving the fuel efficiency of the automobile.

1 is a front view of a conventional variable vane pump;
2 is a front view of a cartridge of a variable vane oil pump for an automotive power steering and automatic transmission according to the present invention.
3 is a plan view of a variable vane oil pump for an automotive power steering and automatic transmission according to the present invention.
4 is an exploded perspective view of a guide member of a variable vane oil pump for an automotive power steering and automatic transmission according to the present invention.
5 is a front view of a variable vane oil pump for an automotive power steering and automatic transmission operating at low speed according to the present invention.
6 is a front view of a variable vane oil pump for an automotive power steering and automatic transmission operating at an intermediate speed according to the present invention.
7 is a front view of a variable vane oil pump for an automotive power steering and automatic transmission operating at high speed according to the present invention.
8 is a front view of a variable vane oil pump for an automotive power steering and automatic transmission according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Also, the terms " part, "" module," and the like, which are described in the specification, mean a unit for processing at least one function or operation, and may be implemented by hardware or software or a combination of hardware and software.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a plan view of a variable vane oil pump for an automotive power steering and automatic transmission according to the present invention, FIG. 4 is a plan view of the variable vane oil pump for an automotive power steering and automatic transmission according to the present invention FIG. 5 is a front view of a variable vane oil pump for an automotive power steering and automatic transmission operating at a low speed according to the present invention, and FIG. 6 is a front view of the variable vane oil pump for an automotive power steering and automatic transmission according to the present invention. FIG. 7 is a front view of a variable vane oil pump for an automotive power steering and automatic transmission operating at high speed according to the present invention, and FIG. 7 is a front view of the variable vane oil pump for an automotive power steering and automatic transmission, FIG. 8 is a block diagram of a vehicle power steering and automatic steering system in accordance with another embodiment of the present invention. In an appointed front view of the variable vane oil pump.

2 to 8, a variable vane pump 1000 according to the present invention is integrally connected to a rotor shaft 131 in a body 140, and includes a plurality of vane grooves A rotor 130 in which a vane 150 for linear motion is inserted; A cylinder ring 160 formed to surround the outer circumference of the rotor 130 so as to be eccentric and rotated by frictional force in contact with the tip of the vane 150 and eccentrically installed with a sliding tolerance; On one side of the outer circumferential surface of the cylinder ring 160, a third elastic member support guide 600 configured to support the cylinder ring 160 to maintain the eccentricity; And a control valve 300 for supporting the cylinder ring 160. The control valve 300 includes a valve piston 300 moving horizontally in a side wall surrounding the side surface of the valve hole, A first valve cap (330) covering the side wall; a second valve cap (330) covering the first valve cap (410); a first pressure member A second pressure chamber 310 positioned on the other side of the valve piston 410 of the side wall ship and a pressure chamber 910 for reducing wear due to friction between the control valve 300 and the valve hole. And 920. The valve piston 410 is moved by a pressure difference between the first pressure chamber 200 and the second pressure chamber 310.

Further, a guide body 401 having a U-shaped concave portion at an upper portion and a through-hole penetrating the upper portion and the lower portion; An adjusting bolt (402) for penetrating and connecting the through hole from the bottom; And one end of a valve piston (410) formed with a through hole is screwed to an end of an adjusting bolt (402) inserted through the through holes when positioned in a U - shaped concave portion corresponding to the through hole of the guide body Wherein the U-shaped concave portion of the guide member 400 is connected to one side of the valve piston 410 and the control valve 300 is connected to the tapered nut 403, The guide member 400 supports and moves the cylinder ring 160 by the movement of the valve piston 410 in the guide member moving space 500 formed in the center of the control valve 300 in the vertical direction.

The lower portion of the guide body 401 of the guide member 400 is formed by a slope having an inclined angle to move the cylinder ring 160. The pressure chambers 910 and 920 are formed by a guide member 400 The eccentric load acts on the upper and lower diagonal lines of the valve piston 410 when the cylinder ring 160 is moved.

A guide member 400 and a guide member moving space 500 for controlling a force to move the valve piston 410 by a pressure generated in the guide member 400 due to the eccentricity of the cylinder ring 160, And the center portion of the body 140 is bent.

This will be described in more detail. The variable vane pump 1000 according to the present invention sucks a small amount or a large amount of the discharge capacity of the oil per rotation and discharges the oil to increase or decrease according to the eccentric distance. The principle of the vane type variable is as follows. The rotor 130 integrated with the rotor shaft 131 is supported by a bearing (not shown) and rotates at the center, and the cylinder ring 160 installed outside the rotor 130 is eccentrically installed. The method of varying the capacity is a method of adjusting the eccentric distance of the cylinder ring 160. That is, by using the control valve 300 and the first elastic member 320, the moving eccentric distance of the cylinder ring 160 can be adjusted and changed.

The first elastic member 320 which applies pressure in one direction to the cylinder ring 160 so that the pump can maintain the maximum capacity in the stopped state is provided in a state in which the pump rotates and the capacity is increased or decreased, Sectional area of the third elastic member 620 and the cylinder ring 160 and the pressure of the first pressure chamber 200 and the pressure of the second pressure chamber 310 of the control valve 300, It becomes a car. The first elastic member 320 supporting the pressure is operated by the external use mechanism so that the pump pressure becomes a high pressure so that the pressures of the first pressure chamber 200 and the second pressure chamber 310 of the control valve 300 are the same The first elastic member 320 supports the pressure of the eccentric sectional area of the third elastic member 620 and the cylinder ring 160. [

When the amount of eccentricity is increased, the volume of the large circular arc to be sucked is increased, the volume of the small circular arc discharging oil is decreased, and a large amount of oil flow is discharged. When the amount of eccentricity is reduced, the volume of the large circular arc to be sucked is reduced. As the volume of the small arc increases, a small amount of oil flow is discharged. When the discharged oil passes through the discharge port 121, pressure is generated in the pump due to the channel resistance.

The pressure in the pump is sent to the first pressure chamber 200 on one side of the control valve 300 to support the valve piston 410. When the oil passes through the discharge port 121, the area of the channel increases and the pressure is reduced. The decompressed oil is connected to the pipe and a part of the oil passes through the orifice pipe 700 to support the valve piston 410 in the second pressure chamber 310 on the other side of the control valve 300 and flows to the oil pipe . The pressures in the first pressure chamber 200 and the second pressure chamber 310 are different in pressure in proportion to the channel resistance. The pressure difference is used to move the control valve 300, and the cylinder ring 160 is moved to adjust the amount of eccentricity. At this time, when the cylinder ring 160 moves, the change in cross-sectional area in which the pressure acts in the compression chamber on the inner surface of the cylinder 160 is divided into the large arc side and the small arc side with respect to the center, And as the large arc side increases, the small arc side decreases. On one side of the change in cross-sectional area, the control valve 300 is closed by a pressure difference between the first pressure chamber 200 and the second pressure chamber 310 of the control valve 300 on the opposite side of the third elastic member 620, ). However, when high pressure is required in a separate external equipment (steering gear cylinder or gear transmission: not shown), the variable vane pump 1000 generates a high pressure. At this time, the pressures of the variable vane pump 1000, the first pressure chamber 200 and the second pressure chamber 310 are maintained at the same pressure. At this time, the cylinder ring 160 is not fixed due to a difference in cross sectional area according to the eccentric position in the inner surface pressure chamber of the cylinder ring 160, but moves in one direction, and the variable vane pump 1000 does not maintain the required amount of oil do. To solve this problem, a guide member 400 having an inclined angle formed in the center rod of the control valve 300 is installed to move the cylinder 160 and realize a variable capacity. The guide member 400 is improved to move and support the cylinder ring 160.

The configuration of the guide member 400 is as follows. A guide body 401 having an inclined lower surface and a U-shaped concave portion at the upper portion and having through holes penetrating the upper and lower portions, an adjusting bolt 402 penetrating through the through hole from below, And a tapered taper nut 403 screwed to an end of the adjustment bolt which is coupled through the hole. The U-shaped upper portion of the guide body 401 is engaged with the valve piston 410.

Sectional area of the inner surface of the cylinder ring 160 and the inner peripheral surface of the third elastic member 140 when the pressure inside the pump is applied in a no-load state in which oil is discharged from the variable vane pump 1000, When the control valve 300 is moved by the pressure difference between the first pressure chamber 200 and the second pressure chamber 310 and the pressure of the pressure chamber 620 acts on the guide member 400, The guide member 400 having the assembled inclined angle formed therein is moved by the control valve 300 so that the cylinder ring 160 is moved. When the external use pressure is high, the first pressure chamber 200 and the second pressure chamber 310 of the variable vane pump 1000 have the same pressure. At this time, a pressure is generated on one side of the cylinder ring 160 by a sectional area eccentric to the compression chamber in the cylinder ring 160 so as to move the control valve 300 by applying pressure to the guide member 400 having the inclined angle. The pressure is reduced due to the installation angle of the first elastic member 320 of the second pressure chamber 310 and the control valve 300. Further, the installation angle of the control valve 300 may be made larger or smaller with reference to the degree of movement of the cylinder ring 160 at 90 degrees (see FIG. 8). The guide member 400 and the control valve 300 having the inclined angle generate frictional pressure in the valve piston 410 and the valve hole by the height of the guide and the inclination angle so as to apply the eccentric load in the diagonal direction. To improve this, a pressure chamber is provided in the valve hole in the eccentric load direction to prevent friction wear of the valve piston 410 and the valve hole.

The present invention will be described in more detail.

The variable vane pump 1000 adjusts the eccentric distance of the cylinder ring 160 to move the cylinder ring 160. That is, the variable vane pump 1000 changes the oil capacity per rotation. When the pump rotational speed increases at a high speed, the amount of oil discharged from the variable vane pump 1000 also increases. However, when the vehicle reaches a predetermined speed, it does not require a large amount of oil. Therefore, the cylinder ring 160 moves, and the oil capacity per pump rotation is increased or decreased and the oil is discharged less.

The inner circumferential surface of the cylinder ring 160 is divided into a suction chamber in which the volume of the passage formed in the plate is gradually increased in the counterclockwise direction from the small arc along the rotational direction of the rotor 130 and a compression chamber in which the volume gradually decreases in the small arc direction Respectively. The plate is fixed with a cylindrical key.

The cross sectional area of the compression chamber in the inner circumferential surface of the cylinder ring 160 acting on the pressure is increased or decreased by moving the cylinder ring 160 with respect to the center of the circle (long hole) and the small arc (short hole) side. As the large arc area decreases, the small arc area increases. When the small arc area decreases, the large arc area increases.

The pressure of the variable vane pump 1000 is generated in proportion to the oil flow rate to be discharged in the idle state (idle state) circulation. The internal pressure of the pump, which is subjected to the resistance of the discharge port (first orifice pipe 700), acts on the first pressure chamber 200 of the hole of the control valve 300 and the pressure decreases in the expanded pipe plug through the discharge port. And passes through the second orifice line in the piping plug and acts on the second pressure chamber 310 of the valve hole. A control valve 300 is installed in the valve hole. The control valve 300 supports the cylinder ring 160 by providing a guide member 400 having an inclined angle at the center concave portion and controls the pressure difference between the first pressure chamber 200 and the second pressure chamber 310 The valve 300 moves and moves the cylinder ring 160. In the control valve 300, a relief valve 800 is installed in a cylindrical hole having a predetermined depth in the direction of the second pressure chamber 310. The relief valve 800 is opened when the pressure is set.

The control valve 300 may be set to be large or small based on the angle of movement of the cylinder ring 160 and 90 degrees. The movement distance of the control valve 300 is long in accordance with the inclination angle of the guide member 400 and the moving distance of the cylinder ring 160 is short and the movement of the control valve 300 is performed using the inclination angle of the guide member 400, The cylinder ring 160 can be easily moved to the guide member 400. Conversely, when the cylinder ring 160 applies force to the guide member 400 to move the control valve 300,

The variable vane pump 1000 generates a medium pressure or a high pressure under a low pressure in a no-load state and a resistance state of a separate external use mechanism (steering gear cylinder or gear transmission). The movement of the control valve 300 increases the flow rate when the rotation speed increases under no-load condition. When the oil flow rate passes through the discharge port 121, a pressure difference occurs between the pressure inside the variable vane pump 1000 and the piping plug pressure. That is, when a pressure difference is generated in the first pressure chamber 200 and the second pressure chamber 310 and the control valve 300 moves in the direction of the second pressure chamber 310, the guide member 400, The pressure of the third elastic member 620 and the pressure of the eccentric sectional area difference of the cylinder ring 160 act to move the cylinder ring 160.

The first pressure chamber 200 of the variable vane pump 1000 and the second pressure chamber 310 and the cylinder ring 160 of the variable vane pump 1000 are connected to each other when the external use pressure requires a high pressure in a state in which the cylinder ring 160 is moved. The inner compression chamber becomes the same pressure state. In this case, the pressure in both directions of the control valve 300 is the same, and the pressure corresponding to the eccentric cross-sectional area of the compression chamber on the inner surface of the cylinder ring 160 and the pressure of the third elastic member 620 apply pressure to the guide member 400 do. At this time, the first elastic member 320 of the second pressure chamber 310 supports the control valve 300. In particular, the pressure acting on the cylinder ring 160 in the longitudinal direction is attenuated by the action of the control valve 300, which is installed at 90 degrees in the transverse direction, and the guide member 400, which is formed at an oblique angle. The width of the guide member 400 and the inclination angle of the guide body 401 are related to the movement distance of the control valve 300. When the inclination angle is small, the movement distance of the control valve 300 becomes long. The cylinder 160 must be able to be easily moved to the control valve 300 and conversely the control valve 300 can not be moved to the cylinder ring 160 so that a high pressure is required for the external use mechanism, The cylinder ring 160 is fixed even when it is changed to the high pressure state to maintain a stable capacity.

The pressure chamber area of the inner circumferential surface of the cylinder ring 160 is determined by the angle of the compression chamber formed on the plate. Considering that the eccentric surface area changes when the cylinder ring 160 moves from the maximum eccentric distance to the center, the eccentric area is firstly made to erase the eccentric area in the direction in which the guide member 400 is installed, It is also possible to allocate the area.

When the eccentric area of the cylinder ring 160 is biased in one direction, it is used in the variable vane pump 1000 having a small capacity. In the variable vane pump 1000 having a large capacity, the eccentric sectional area can be distributed between the large arc and the small arc .

For example, when the external pressure is not applied to the variable vane pump 1000, the pressure in the variable vane pump 1000 and the pressure in the first pressure chamber become equal to each other under the pressure of the pipe of the first orifice tube 700 discharging the oil, And the pipe line is expanded, so that the pressure is reduced. The pressure of the second pressure chamber 310 supplied through the second orifice tube in the plug connecting the first orifice tube 700 and the pipe becomes the lowest pressure. The pressure of the variable vane pump (1000) is 8 kg to 25 kg and the pressure of the second pressure chamber is 75 to 75% of the pressure of the variable vane pump (1000) 85%. A pressure difference is generated due to a difference between the sectional area of the first orifice pipe 700 and the sectional area of the pipe. On the other hand, when a load is applied to the external equipment, the same pressure is applied to the inner peripheral surfaces of the variable vane pump 1000, the piping, the first pressure chamber 200, the second pressure chamber 310 and the cylinder 160 compression chamber . At this time, the pressure is less than 150 kg under the set pressure of the relief valve at 25 kg or more.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: Cartridge
110:
120: Discharge channel
130: Rotor
131: rotor shaft
140: Body
150: Vane
160: Cylinder ring
200: first pressure chamber
300: Control valve
310: Second pressure chamber
320: first elastic member
330: first valve cap
400: guide member
401: Guide body
402: adjusting bolt
403: Taper nut
410: valve piston
500: moving space of the guide member
600: Guide for supporting the third elastic member
610: a second elastic member
620: third elastic member
630: second valve cap
800: relief valve
1000: variable vane pump

Claims (6)

delete A rotor 130 integrally connected to the rotor shaft 131 in the body 140 and fitted with a vane 150 that linearly moves along a plurality of vane grooves distributed in a circumferential direction; A cylinder ring 160 formed to surround the outer circumference of the rotor 130 so as to be eccentric and rotated by a frictional force in contact with the tip of the vane 150 and eccentrically installed with a sliding tolerance; A third elastic member support guide 600 configured to support the cylinder ring 160 to maintain eccentricity on one side of the outer circumferential surface of the cylinder ring 160; And a control valve (300) and a guide member (400) for supporting the cylinder ring (160) on the other side of the outer circumference of the cylinder ring (160);
The control valve 300 includes a valve piston 410 that horizontally moves within a side wall surrounding a side of the valve hole, a first elastic member 320 that supports the valve piston 410, A first pressure chamber 200 positioned at one side of the valve piston 410 in the side wall and a second pressure chamber 200 located at the other side of the valve piston 410 in the side wall , And a pressure chamber (910, 920) for reducing wear due to friction between the control valve (300) and the valve hole, wherein the first pressure chamber (200) and the second pressure chamber 310) to move the valve piston (410);
The guide member 400 includes a guide body 401 having an upper U-shaped concave portion and a through-hole penetrating the upper portion and the lower portion, an adjusting bolt 402 for penetrating the through hole from below, One end of the valve piston 410 having the through-hole formed therein is connected to the end of the adjusting bolt 402, which is coupled through the through-holes when positioned in the U-shaped recess so as to correspond to the through hole of the guide body 401 And a tapered nut (403) having a tapered shape to be screwed together;
The U-shaped concave portion is connected to one side of the valve piston 410 and is disposed at a central portion of the control valve 300 in a guide member moving space 500 formed in the vertical circumferential direction with the control valve 300 , To support and move the cylinder ring (160) by movement of the valve piston (410);
The lower portion of the guide body 401 of the guide member 400 is formed at an oblique angle with a slope so as to move the cylinder ring 160;
The pressure chambers 910 and 920 can relieve the eccentric load acting on the upper and lower diagonal lines of the valve piston 410 when the cylinder ring 160 is moved to the guide member 400 having the inclined angle, And a variable vane oil pump for an automotive power steering and automatic transmission. delete delete delete 3. The method of claim 2,
A guide member moving space 500 is formed in the guide member 400 so that a force for moving the valve piston 410 can be dispersed and controlled by the pressure generated in the guide member 400 due to the eccentricity of the cylinder ring 160 ;
And the center portion of the body (140) is formed to be bent.
KR1020150124593A 2015-09-03 2015-09-03 Variable vane oil pump for powersteering and automatic transmission of vehicle KR101744690B1 (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
KR20210081884A (en) 2019-12-24 2021-07-02 조봉현 Variable vane oil pump

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Publication number Priority date Publication date Assignee Title
WO2019189961A1 (en) * 2018-03-29 2019-10-03 조봉현 Variable vane pump
CN109357144A (en) * 2018-12-18 2019-02-19 湖南机油泵股份有限公司 A kind of pressure limiting valve plug screw and plunger type lubrication oil pump pressure limiting valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210081884A (en) 2019-12-24 2021-07-02 조봉현 Variable vane oil pump

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