CN115289258B - Constant pressure device - Google Patents

Constant pressure device Download PDF

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Publication number
CN115289258B
CN115289258B CN202210930546.1A CN202210930546A CN115289258B CN 115289258 B CN115289258 B CN 115289258B CN 202210930546 A CN202210930546 A CN 202210930546A CN 115289258 B CN115289258 B CN 115289258B
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China
Prior art keywords
liquid inlet
balance
liquid outlet
hole
inlet hole
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CN202210930546.1A
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Chinese (zh)
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CN115289258A (en
Inventor
文维民
戴冬华
罗娜
余秀宇
王进武
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Cssc Jiujiang Boiler Co ltd
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Cssc Jiujiang Boiler Co ltd
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Priority to CN202210930546.1A priority Critical patent/CN115289258B/en
Publication of CN115289258A publication Critical patent/CN115289258A/en
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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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
    • F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/18—Lubricating
    • 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
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
    • 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
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
    • 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
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • F16K3/36—Features relating to lubrication
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/10—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger
    • G05D16/101—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger the controller being arranged as a multiple-way valve

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Safety Valves (AREA)

Abstract

The invention discloses a constant-pressure device, and relates to the technical field of pressure regulating devices. The invention comprises a pressure regulating valve and a pressure balance device, wherein the pressure balance device comprises a valve body, a balance valve core and two valve covers; the two valve caps are respectively and hermetically arranged at the two ends of the valve body through bolts; the valve body is of a linear structure; the inner wall of the valve body is provided with a lining; the balance valve core is in airtight sliding fit with the inner wall of the lining; a first liquid inlet hole and a first liquid outlet hole are respectively formed on the opposite side wall of one end of the valve body and the inner lining; the opposite side wall of the other end of the valve body and the inner liner is provided with a second liquid inlet hole and a second liquid outlet hole respectively; the first liquid inlet hole, the first liquid outlet hole, the second liquid inlet hole and the second liquid outlet hole are provided with connectors; the first liquid outlet hole axis and the second liquid outlet hole axis are both between the first liquid inlet hole axis and the second liquid inlet hole axis; the middle part of the balance valve core is provided with an annular groove. According to the invention, the pressure regulating valve is matched with the balance pressure device to stabilize the oil pressure at the inlet of the variable frequency pump, so that the output fuel flow of the variable frequency pump is stabilized.

Description

Constant pressure device
Technical Field
The invention belongs to the technical field of pressure regulating devices, and particularly relates to a constant pressure device.
Background
The pressure of the oil return pipeline is also changed under the influence of the oil tank, the oil temperature, the frequency of the variable frequency pump on the annular pipeline and the like, so that the oil pressure in the pipeline is changed, and the pressure of the inlet of the variable frequency pump is influenced. When the pressure of the inlet of the variable frequency pump changes, the flow of the variable frequency pump can be greatly fluctuated under the working condition of rated frequency, and in order to stabilize the pressure of the inlet of the variable frequency pump, the balance device is additionally arranged at the inlet of the variable frequency pump. The application provides a constant-pressure device.
Disclosure of Invention
The invention aims to provide a constant pressure device which can stabilize the oil pressure at the inlet of a variable frequency pump through the cooperation of a pressure regulating valve and a constant pressure device, so as to stabilize the output fuel flow of the variable frequency pump.
In order to solve the technical problems, the invention is realized by the following technical scheme:
The invention relates to a constant-pressure device, which comprises a pressure regulating valve and a constant-pressure device, wherein the constant-pressure device comprises a valve body, a balance valve core and two valve covers; the two valve caps are respectively and hermetically arranged at the two ends of the valve body through bolts; the inside of the valve body is of a linear structure; the inner wall of the valve body is provided with a lining; the balance valve core is in airtight sliding fit with the inner wall of the lining; a first liquid inlet hole and a first liquid outlet hole are respectively formed in the opposite side wall of one end of the valve body and one end of the lining; the opposite side wall of the other end of the valve body and the inner liner is provided with a second liquid inlet hole and a second liquid outlet hole respectively; the first liquid inlet hole, the first liquid outlet hole, the second liquid inlet hole and the second liquid outlet hole are all provided with connectors; the first liquid outlet hole axis and the second liquid outlet hole axis are both between the first liquid inlet hole axis and the second liquid inlet hole axis; an annular groove is formed in the middle of the balance valve core; the upper end of the valve body is provided with a threaded hole penetrating through the valve body and the lining; the threaded hole is in threaded connection with a sealing bolt; lubricating oil is poured between the annular groove and the lining; the centers of two ends of the balance valve core are respectively provided with a first cylindrical boss; and a second cylindrical boss matched with the first cylindrical boss is arranged in the center of the inner side end of the valve cover.
As a preferable technical scheme of the invention, the cross-sectional area of the first liquid inlet hole, the cross-sectional area of the first liquid outlet hole, the cross-sectional area of the second liquid inlet hole and the cross-sectional area of the second liquid outlet hole are the same; the right facing area of the first liquid inlet hole and the first liquid outlet hole is half of the cross section area of the first liquid inlet hole; the right facing area of the second liquid inlet hole and the second liquid outlet hole is half of the cross section area of the second liquid inlet hole.
As a preferable technical scheme of the invention, the bottoms of the two ends of the valve body are respectively provided with a supporting installation seat.
As a preferable technical scheme of the invention, the cross section of the annular groove is of a C-shaped structure.
As a preferable technical scheme of the invention, a reset spring is respectively arranged between the two valve covers and the two ends of the balance valve core; and two ends of the reset spring are respectively inserted and sleeved on the first cylindrical boss and the second cylindrical boss.
As a preferable technical scheme of the invention, both ends of the balance valve core are provided with annular open grooves; the axis of the annular open slot is collinear with the axis of the balance valve core; the cross section of the annular open slot is of a V-shaped structure.
As a preferable technical scheme of the invention, the end face of the first cylindrical boss is provided with a first blind hole.
As a preferable technical scheme of the invention, the end face of the second cylindrical boss is provided with a second blind hole.
As a preferable technical scheme of the invention, the liquid level of the lubricating oil between the annular groove and the lining is 1/3-2/3 of the diameter of the balance valve core.
The invention has the following beneficial effects:
1. When external factors influence the fluctuation of the inlet pressure of the variable frequency pump, the fluctuation of the flow of the variable frequency pump is larger, and the pressure regulating valve and the pressure balance device are matched to stabilize the inlet oil pressure of the variable frequency pump, so that the output fuel flow of the variable frequency pump is stabilized.
2. The flow areas of the first liquid outlet hole and the second liquid outlet hole of the balance pressure device depend on the positions of the balance valve cores, any pressure difference between two opposite end surfaces of the balance valve cores can enable the balance valve cores to move towards the side with lower pressure, and therefore the outlet area of the end with lower pressure is reduced, and the flow rate of fuel flowing through the end is reduced. The outlet area of the end with higher original pressure is increased, so that the flow rate of the fuel flowing through the fuel is increased. Therefore, the oil pressure at the two ends of the balance valve core and the oil pressure at the inlet of the variable frequency pump are always constant.
3. The annular open grooves formed at the two ends of the balance valve core increase the stress area of the end part of the balance valve core, increase the stress area, reduce the pressure on the end surface of the balance valve core and increase the durability of the balance valve core.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of the constant voltage device of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a cross-sectional view at A-A in fig. 2.
Fig. 4 is a schematic view of the structure of the balance valve body, the balance valve core and the inner lining in the balance pressure device after being partially cut away.
Fig. 5 is a top view of fig. 4.
Fig. 6 is a schematic diagram of installation and use of the first embodiment of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
The valve comprises a valve body, a 2-balance valve core, a 3-valve cover, a 4-lining, a 5-sealing bolt, a 6-reset spring, a 11-first liquid inlet hole, a 12-first liquid outlet hole, a 13-second liquid inlet hole, a 14-second liquid outlet hole, a 15-threaded hole, a 16-support mounting seat, a 21-annular groove, a 22-first cylindrical boss, a 23-annular open groove, a 31-second cylindrical boss and a 32-second blind hole.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
First embodiment:
Referring to fig. 1-5, the invention discloses a pressure balance device, which comprises a pressure regulating valve and a pressure balance device, wherein the pressure balance device comprises a valve body 1, a balance valve core 2 and two valve covers 3; the two valve caps 3 are respectively and hermetically arranged at the two ends of the valve body 1 through bolts; the inside of the valve body 1 is of a linear structure; the inner wall of the valve body 1 is provided with a lining 4; the balance valve core 2 is in airtight sliding fit with the inner wall of the lining 4; the opposite side walls of one end of the valve body 1 and one end of the lining 4 are respectively provided with a first liquid inlet hole 11 and a first liquid outlet hole 12; the opposite side walls of the other ends of the valve body 1 and the lining 4 are respectively provided with a second liquid inlet hole 13 and a second liquid outlet hole 14; the first liquid inlet hole 11, the first liquid outlet hole 12, the second liquid inlet hole 13 and the second liquid outlet hole 14 are all provided with connectors; the axes of the first liquid outlet hole 12 and the second liquid outlet hole 14 are arranged between the axes of the first liquid inlet hole 11 and the second liquid inlet hole 13; an annular groove 21 is formed in the middle of the balance valve core 2, and the cross section of the annular groove 21 is of a C-shaped structure; the upper end of the valve body 1 is provided with a threaded hole 15 penetrating through the valve body 1 and the lining 4; the threaded hole 15 is connected with a sealing bolt 5 in a threaded manner; lubricating oil is poured between the annular groove 21 and the lining 4; the centers of two ends of the balance valve core 2 are respectively provided with a first cylindrical boss 22; the center of the inner side end of the valve cover 3 is provided with a second cylindrical boss 31 matched with the first cylindrical boss 22.
The cross-sectional area of the first liquid inlet hole 11, the cross-sectional area of the first liquid outlet hole 12, the cross-sectional area of the second liquid inlet hole 13 and the cross-sectional area of the second liquid outlet hole 14 are the same; the right facing area of the first liquid inlet hole 11 and the first liquid outlet hole 12 is half of the cross-sectional area of the first liquid inlet hole 11; the opposite area of the second liquid inlet hole 13 and the second liquid outlet hole 14 is half of the cross-sectional area of the second liquid inlet hole 13.
One specific application of this embodiment is:
As shown in fig. 6, the device is provided with two pre-pumps which are connected in parallel and used for pressurizing and a variable frequency pump used for constant-pressure oil supply in implementation, wherein the two pre-pumps are connected in parallel and output through a three-way pipe, one of the two pre-pumps is conveyed to the pressure regulating valve, the other of the two pre-pumps is conveyed to the first liquid inlet 11 of the constant-pressure device, the first liquid outlet 12 of the constant-pressure device and a separate pipeline supply oil to the variable frequency pump, and then the variable frequency pump outputs the oil. The oil after pressure regulation of the pressure regulating valve is conveyed to the second liquid inlet hole 13 of the pressure balance through a separate pipeline, and then is output into the oil return tank through the second liquid outlet hole 14 of the pressure balance.
The flow area of the first liquid outlet hole 12 and the second liquid outlet hole 14 of the balance valve core 2 depends on the position of the balance valve core 2, any pressure difference between two opposite end surfaces of the balance valve core 2 can enable the balance valve core 2 to move towards the side with lower pressure, so that the outlet area of the end with lower pressure is reduced, and the flow rate of fuel flowing through the end is reduced. The outlet area of the end with higher original pressure is increased, so that the flow rate of the fuel flowing through the fuel is increased. Therefore, the oil pressure at the two ends of the balance valve core 2 and the oil pressure at the inlet of the variable frequency pump are always constant.
When external factors influence the fluctuation of the inlet pressure of the variable frequency pump, the fluctuation of the flow of the variable frequency pump is larger, and the pressure regulating valve and the pressure balance device are matched to stabilize the inlet oil pressure of the variable frequency pump, so that the output fuel flow of the variable frequency pump is stabilized.
Specific embodiment II:
on the basis of the first embodiment, the present embodiment is different in that:
As shown in fig. 3, a return spring 6 is respectively arranged between the two valve caps 3 and the two ends of the balance valve core 2; the two ends of the reset spring 6 are respectively inserted and sleeved on the first cylindrical boss 22 and the second cylindrical boss 31.
As shown in fig. 3, both ends of the balance valve core 2 are provided with annular open grooves 23; the axis of the annular open groove 23 is collinear with the axis of the balance valve core 2; the cross section of the annular open groove 23 is of a V-shaped structure.
And a reset spring 6 is respectively added at two ends of the balance valve core 2 to play a role in pressure regulation and buffering.
The annular open grooves 23 formed at the two ends of the balance valve core 2 increase the stress area of the end part of the balance valve core 2, increase the stress area, reduce the pressure on the end surface of the balance valve core 2 and increase the durability of the balance valve core 2.
Third embodiment:
on the basis of the second embodiment, the difference of this embodiment is that:
As shown in fig. 5, a support mount 16 is respectively installed at the bottoms of both ends of the valve body 1. The support mounting base 16 is arranged to facilitate installation and fixation.
As shown in fig. 3, the end surface of the first cylindrical boss 22 is provided with a first blind hole 24. The end face of the second cylindrical boss 31 is provided with a second blind hole 32. The first blind hole 24 and the second blind hole 32 are formed for buffering metal expansion caused by hydraulic pressure and high temperature of oil.
The liquid level of the lubricating oil between the annular groove 21 and the lining 4 is 1/3-2/3 of the diameter of the balance valve core 2. The lubricating oil is stored in the closed space between the annular groove 21 and the lining 4, so that the movement of the balance valve core 2 in the lining 4 is effectively lubricated.
The above schemes are all used for improving the smoothness of the movement of the internal balance valve core 2.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.

Claims (6)

1. The utility model provides a constant pressure device, includes air-vent valve and constant pressure ware, its characterized in that:
the pressure balance device comprises a valve body (1), a balance valve core (2) and two valve covers (3); the two valve caps (3) are respectively arranged at the two ends of the valve body (1) in a sealing way through bolts;
the inside of the valve body (1) is of a linear structure; the inner wall of the valve body (1) is provided with a lining (4); the balance valve core (2) is in airtight sliding fit with the inner wall of the lining (4);
a first liquid inlet hole (11) and a first liquid outlet hole (12) are respectively formed in the opposite side walls of one end of the valve body (1) and one end of the lining (4);
A second liquid inlet hole (13) and a second liquid outlet hole (14) are respectively formed in the opposite side walls of the other ends of the valve body (1) and the inner liner (4);
The first liquid inlet hole (11), the first liquid outlet hole (12), the second liquid inlet hole (13) and the second liquid outlet hole (14) are provided with connectors; the axes of the first liquid outlet hole (12) and the second liquid outlet hole (14) are arranged between the axes of the first liquid inlet hole (11) and the second liquid inlet hole (13);
An annular groove (21) is formed in the middle of the balance valve core (2); the upper end of the valve body (1) is provided with a threaded hole (15) penetrating through the valve body (1) and the lining (4); the threaded hole (15) is in threaded connection with a sealing bolt (5); lubricating oil is poured between the annular groove (21) and the lining (4);
the centers of two ends of the balance valve core (2) are respectively provided with a first cylindrical boss (22);
A second cylindrical boss (31) matched with the first cylindrical boss (22) is arranged in the center of the inner side end of the valve cover (3); the cross-sectional area of the first liquid inlet hole (11), the cross-sectional area of the first liquid outlet hole (12), the cross-sectional area of the second liquid inlet hole (13) and the cross-sectional area of the second liquid outlet hole (14) are the same; the right facing area of the first liquid inlet hole (11) and the first liquid outlet hole (12) is half of the cross section area of the first liquid inlet hole (11); the right facing area of the second liquid inlet hole (13) and the second liquid outlet hole (14) is half of the cross section area of the second liquid inlet hole (13); a reset spring (6) is respectively arranged between the two valve covers (3) and the two ends of the balance valve core (2); two ends of the reset spring (6) are respectively inserted and sleeved on the first cylindrical boss (22) and the second cylindrical boss (31); annular open grooves (23) are formed in two ends of the balance valve core (2); the axis of the annular open groove (23) is collinear with the axis of the balance valve core (2); the cross section of the annular open groove (23) is of a V-shaped structure.
2. A balance pressure device according to claim 1, characterized in that the bottoms of the two ends of the valve body (1) are respectively provided with a supporting mounting seat (16).
3. A constant pressure device according to claim 1, characterized in that the cross section of the annular groove (21) is of C-shaped configuration.
4. A constant pressure device according to claim 1, characterized in that the end face of the first cylindrical boss (22) is provided with a first blind hole (24).
5. A constant pressure device according to claim 1, characterized in that the end face of the second cylindrical boss (31) is provided with a second blind hole (32).
6. A balance pressure device according to claim 1, characterized in that the level of lubricating oil between the annular groove (21) and the inner liner (4) is 1/3-2/3 of the diameter of the balance valve core (2).
CN202210930546.1A 2022-08-04 2022-08-04 Constant pressure device Active CN115289258B (en)

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Application Number Priority Date Filing Date Title
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CN115289258B true CN115289258B (en) 2024-05-28

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4825748A (en) * 1987-07-02 1989-05-02 Parker-Hannifin Corporation Hydraulic actuator synchronization apparatus and system
CN201753784U (en) * 2010-08-25 2011-03-02 黄新 Two-position four-way hydraulic control switch valve
DE102009060188A1 (en) * 2009-12-23 2011-06-30 Schwäbische Hüttenwerke Automotive GmbH, 73433 Adjustable valve for positive-displacement pump, has pressure chamber whose inlet and outlet are separated from each other with valve body provided in one position and connected with each other with valve body in another position
CN105202239A (en) * 2015-08-25 2015-12-30 江西中船航海仪器有限公司 Diaphragm-type liquid pressure regulating valve
CN108361136A (en) * 2018-01-29 2018-08-03 中国第汽车股份有限公司 High pressure co-rail system
CN111473119A (en) * 2020-05-12 2020-07-31 桂林市啄木鸟医疗器械有限公司 Pressure regulating valve and pressure regulating system
CN214304614U (en) * 2021-01-27 2021-09-28 北京宏基世达液压有限公司 Pilot-operated proportional pressure reducing valve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4825748A (en) * 1987-07-02 1989-05-02 Parker-Hannifin Corporation Hydraulic actuator synchronization apparatus and system
DE102009060188A1 (en) * 2009-12-23 2011-06-30 Schwäbische Hüttenwerke Automotive GmbH, 73433 Adjustable valve for positive-displacement pump, has pressure chamber whose inlet and outlet are separated from each other with valve body provided in one position and connected with each other with valve body in another position
CN201753784U (en) * 2010-08-25 2011-03-02 黄新 Two-position four-way hydraulic control switch valve
CN105202239A (en) * 2015-08-25 2015-12-30 江西中船航海仪器有限公司 Diaphragm-type liquid pressure regulating valve
CN108361136A (en) * 2018-01-29 2018-08-03 中国第汽车股份有限公司 High pressure co-rail system
CN111473119A (en) * 2020-05-12 2020-07-31 桂林市啄木鸟医疗器械有限公司 Pressure regulating valve and pressure regulating system
CN214304614U (en) * 2021-01-27 2021-09-28 北京宏基世达液压有限公司 Pilot-operated proportional pressure reducing valve

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