Classifications

• • 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
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
  • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
  • F16K31/0603—Multiple-way valves
  • F16K31/061—Sliding valves
  • F16K31/0613—Sliding valves with cylindrical slides
• • 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
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
  • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/8593—Systems
  • Y10T137/86493—Multi-way valve unit
  • Y10T137/86574—Supply and exhaust
  • Y10T137/86622—Motor-operated

Definitions

• the present invention relates to an electrohydraulic proportional control valve that controls the pressure on the output side by supplying current to a solenoid.
• a cylinder 3 is fitted into a valve hole 2 drilled in a valve body 1, and an inlet port 4 and a drain port 5 are fitted into the cylinder 3.
• the inside 3a of the distal end of the cylindrical body 3 is communicated with the output port 6, and the spool 7 is inserted into the cylindrical body 3 and the spool 7 is connected to the shaft 7.
• a hole 8 and a radial port 9 communicating with the shaft hole 8 and located at the small diameter portion 7a of the spool 7 are formed, and the spool 7 is provided with a spring 10 spring.
• the stroke of the movable rod 11a is changed by changing the amount of electricity to the solenoid 11 to reduce the diameter of the small-diameter portion 7a. Since the opening area of the inlet port 4 can be increased or decreased, the pressure of the output robot 6 can be controlled by a control proportional to the amount of current to the solenoid 11. Wear .
• the spool 7 will have a small-diameter portion 7a with a drain when the current to the solenoid 11 is zero. This is the position where it communicates with port 5, and the pressure on the output port 6 side becomes zero because it communicates with tank 12. If there is air in the output side oil passage, energize the solenoid 11 and press the spool 7 with the movable rod 11a to compress the air when the output pressure is raised. As a result, it takes time for the force and the spool 7 to move to a position where the small-diameter portion 7a communicates with the inlet port 4, and the response is poor. .
• the present invention has been made in view of the above-described circumstances, and a purpose thereof is to constantly fill the output-side oil passage with hydraulic pressure so that the output-side oil passage is filled.
• Electro-hydraulic proportional control valve that prevents air from being present in the oil passage and moves the spool without time delay when the solenoid is energized to improve responsiveness. It is to provide
• a spoo for interrupting communication between an inlet port connected to a hydraulic pump and an outlet port on an output side. And the spool acts on the distal end of the spool so as to maintain the spool at a position where the inlet port and the outlet port are slightly communicated with each other.
• Oil pressure and Panel means are provided for applying a balancing spring to the proximal end of the spool, and are provided to face the proximal end of the spool.
• Solenoid having a movable rod which urges the spool in a direction in which the inlet port and the outlet port are completely communicated when energized.
• An electrohydraulic proportional control valve having the following is provided.
• the spool is held at a spring-car hydraulic balance position where the inlet port and the outlet port are slightly connected by the force of the spring, and hydraulic pressure is supplied to the outlet-side oil passage. As the air fills and the air no longer exists, when the solenoid is energized, the spool moves without a time delay to improve responsiveness.
• FIG. 1 is a schematic sectional view of a conventional example.
• FIG. 2 is a schematic cross-sectional view also showing a specific example of the present invention
• FIG. 3 is a schematic cross-sectional view showing a specific example of the present invention when the solenoid current is zero.
• It is a diagram and Fig. 4 is a graph showing the relationship between the solenoid current and the outlet pressure on the output side.
• a spring receiver 20 is provided on the proximal end side of the spool 7 and, between the spring receiver 20 and the flange 7b of the spoonhole 7,
• the first spring 21 is provided, and the second spring 22 is provided between the spring receiver 20 and the cylindrical body 3 so that the stopper 20 is brought into contact with the stopper 23.
• the spool 7 is constantly pushed to the left in the figure by the first spring 21 and the inlet port 4 is turned into the outlet port small diameter portion 7 as shown in FIG.
• the movable rod 11a is separated from the spring catcher 20 when the power supply to the solenoid 11 is set to zero while the position is slightly in communication with a. That is, when the power supply of the solenoid is zero, the spring of the first panel 21 is located at a position where the inlet port 4 and the outlet port 6 slightly communicate with each other. In other words, the pressure is set so as to be balanced with the oil pressure acting on the tip side of the spoonhole at that time.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Magnetically Actuated Valves (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=15856212

Family Applications (1)

Country Status (5)

Families Citing this family (13)

Citations (2)

Family Cites Families (6)

• 1988
  • 1988-12-27 JP JP1988167793U patent/JPH0724711Y2/ja not_active Expired - Lifetime
• 1989
  • 1989-12-27 US US07/720,509 patent/US5163477A/en not_active Expired - Fee Related
  • 1989-12-27 EP EP19900901020 patent/EP0451272A4/en not_active Withdrawn
  • 1989-12-27 KR KR1019900701846A patent/KR910700426A/ko not_active Application Discontinuation
  • 1989-12-27 WO PCT/JP1989/001315 patent/WO1990007669A1/ja not_active Application Discontinuation

Patent Citations (2)

Non-Patent Citations (1)

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