CN115289258A - Pressure balancing device - Google Patents

Pressure balancing device Download PDF

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Publication number
CN115289258A
CN115289258A CN202210930546.1A CN202210930546A CN115289258A CN 115289258 A CN115289258 A CN 115289258A CN 202210930546 A CN202210930546 A CN 202210930546A CN 115289258 A CN115289258 A CN 115289258A
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CN
China
Prior art keywords
pressure
liquid inlet
inlet hole
liquid outlet
hole
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Granted
Application number
CN202210930546.1A
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Chinese (zh)
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CN115289258B (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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Publication of CN115289258B publication Critical patent/CN115289258B/en
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    • 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 pressure balancing device, and relates to the technical field of pressure regulating devices. The invention comprises a pressure regulating valve and a pressure balancer, wherein the pressure balancer comprises a valve body, a balance valve core and two valve covers; the two valve covers are respectively installed at the two ends of the valve body through bolts in a sealing manner; the interior 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 sealed 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 valve body and the opposite side walls of one end of the lining; a second liquid inlet hole and a second liquid outlet hole are respectively formed in the valve body and the opposite side wall of the other end of the lining; joints are arranged on the first liquid inlet hole, the first liquid outlet hole, the second liquid inlet hole and the second liquid outlet hole; the axis of the first liquid outlet hole and the axis of the second liquid outlet hole are both between the axis of the first liquid inlet hole and the axis of the second liquid inlet hole; the middle part of the balance valve core is provided with an annular groove. The invention can stabilize the oil pressure at the inlet of the variable frequency pump by matching the pressure regulating valve with the pressure balancer, thereby stabilizing the output fuel flow of the variable frequency pump.

Description

Pressure balancing device
Technical Field
The invention belongs to the technical field of pressure regulating devices, and particularly relates to a pressure balancing device.
Background
The pressure of the oil return pipeline can also change under the influence of the conditions of an oil tank, the oil temperature, the frequency of a variable frequency pump on the annular pipeline and the like, so that the oil pressure in the pipeline changes, and the pressure at the inlet of the variable frequency pump is influenced. When frequency conversion pump entry pressure changes, can lead to the frequency conversion pump that the flow can take place big fluctuation under the rated frequency operating mode, in order to stabilize the pressure of frequency conversion pump entry, consequently install balancing unit additional at the frequency conversion pump entry and be imperative. To this end, the present document provides a pressure-balancing device.
Disclosure of Invention
The invention aims to provide a pressure balancing device which can stabilize oil pressure at an inlet of a variable frequency pump through the matching of a pressure regulating valve and a pressure balancing device, so that the output fuel flow of the variable frequency pump is stabilized.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a pressure balancing device, which comprises a pressure regulating valve and a pressure balancing device, wherein the pressure balancing device comprises a valve body, a balancing valve core and two valve covers; the two valve covers are respectively installed at two ends of the valve body in a sealing mode through bolts; the interior 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 sealed 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 valve body and the opposite side wall of one end of the lining; a second liquid inlet hole and a second liquid outlet hole are respectively formed in the valve body and the opposite side wall of the other end of the lining; joints are arranged on the first liquid inlet hole, the first liquid outlet hole, the second liquid inlet hole and the second liquid outlet hole; the first liquid outlet axis and the second liquid outlet axis are both between the first liquid inlet axis and the second liquid inlet 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 at the center of the inner side end of the valve cover.
As a preferred technical scheme of the invention, the cross-sectional areas of the first liquid inlet hole, the first liquid outlet hole, the second liquid inlet hole and the second liquid outlet hole are the same; the area of the first liquid inlet hole opposite to the first liquid outlet hole is half of the cross section area of the first liquid inlet hole; the area of the second liquid inlet hole opposite to the second liquid outlet hole is half of the cross-sectional area of the second liquid inlet hole.
As a preferable technical scheme of the invention, the bottom parts 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 preferred technical scheme of the invention, a return 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 preferred technical scheme of the invention, two ends of the balance valve core are both 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 height 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 pressure fluctuation of the inlet of the variable frequency pump, the flow fluctuation of the variable frequency pump is large, and the pressure regulating valve is matched with the pressure balancer to stabilize the oil pressure of the inlet of the variable frequency pump, so that the output fuel flow of the variable frequency pump is stabilized.
2. According to the invention, the flow areas of the first liquid outlet hole and the second liquid outlet hole of the pressure balancing device depend on the position of the balancing valve core, and any pressure difference on two opposite end surfaces of the balancing valve core can enable the balancing valve core to move towards the side with lower pressure, so that the area of the outlet at the end with lower pressure is reduced, and the flow of the fuel flowing through is reduced. And the area of the outlet at the end with higher pressure is increased, so that the flow rate of the fuel flowing through 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 and invariable.
3. The annular open grooves formed in 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 face of the balance valve core and increase the durability of the balance valve core.
Of course, it is not necessary for any product to practice the invention to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the pressure balancer of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 isbase:Sub>A cross-sectional view taken atbase:Sub>A-base:Sub>A in fig. 2.
Fig. 4 is a schematic structural diagram of the pressure balancer with the valve body, the balance valve core and the lining partially cut away.
Fig. 5 is a top view of fig. 4.
Fig. 6 is a schematic view of installation and use of the first embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1-valve body, 2-balance valve core, 3-valve cover, 4-lining, 5-sealing bolt, 6-reset spring, 11-first liquid inlet hole, 12-first liquid outlet hole, 13-second liquid inlet hole, 14-second liquid outlet hole, 15-threaded hole, 16-support mounting seat, 21-annular groove, 22-first cylindrical boss, 23-annular open groove, 31-second cylindrical boss and 32-second blind hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1-5, the present invention is a pressure-balancing device, which includes a pressure-regulating valve and a pressure-balancing device, wherein the pressure-balancing device includes a valve body 1, a balancing valve core 2, and two valve covers 3; the two valve covers 3 are respectively installed at the two ends of the valve body 1 through bolts in a sealing manner; the interior 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 sealed sliding fit with the inner wall of the lining 4; the valve body 1 and the opposite side walls of 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 end 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; joints are arranged on 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; the axes of the first liquid outlet hole 12 and the second liquid outlet hole 14 are both 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 which penetrates 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; the center of the inner end of the valve cover 3 is provided with a second cylindrical boss 31 which is matched with the first cylindrical boss 22.
The cross-sectional areas of 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 the same; the area of the first liquid inlet hole 11 opposite to the first liquid outlet hole 12 is half of the cross-sectional area of the first liquid inlet hole 11; the area of the second liquid inlet hole 13 opposite to 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, in the implementation, the two pre-pumps are connected in parallel for pressurization, and the variable frequency pump for constant-pressure oil supply is provided, the two pre-pumps are connected in parallel and output through a three-way pipe, one is conveyed to the pressure regulating valve, the other is conveyed to the first liquid inlet hole 11 of the pressure balancer, oil is supplied to the variable frequency pump through the first liquid outlet hole 12 of the pressure balancer and a single pipe, and then the oil is output from the variable frequency pump. The oil liquid regulated by the pressure regulating valve is conveyed to a second liquid inlet hole 13 of the pressure balancing device through a single pipeline, and then is output to an oil return pool through a second liquid outlet hole 14 of the pressure balancing device.
The flow area of the first outlet hole 12 and the second outlet hole 14 of the pressure balancing device depends on the position of the balancing valve core 2, and any pressure difference between two opposite end surfaces of the balancing valve core 2 will move the balancing valve core 2 to the side with lower pressure, so that the area of the outlet at the side with lower pressure is reduced, and the flow rate of the fuel flowing through is reduced. And the area of the outlet at the end with higher pressure is increased, so that the flow of the fuel flowing through 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 and invariable.
When external factors influence the pressure fluctuation of the inlet of the variable frequency pump, the flow fluctuation of the variable frequency pump is large, and the pressure regulating valve is matched with the pressure balancer to stabilize the oil pressure of the inlet of the variable frequency pump, so that the output fuel flow of the variable frequency pump is stabilized.
The second concrete embodiment:
on the basis of the first specific embodiment, the present embodiment is different in that:
as shown in fig. 3, a return 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 return spring 6 are respectively inserted and sleeved on the first cylindrical boss 22 and the second cylindrical boss 31.
As shown in fig. 3, two ends of the balance valve core 2 are both provided with an annular open slot 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.
Two ends of the balance valve core 2 are respectively added with a return spring 6 to play a role in pressure regulation and buffering.
The annular open grooves 23 formed in 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 face of the balance valve core 2, and increase the durability of the balance valve core 2.
The third concrete embodiment:
on the basis of the second specific embodiment, the present embodiment is different in that:
as shown in fig. 5, a support mounting seat 16 is respectively mounted at the bottom of each end of the valve body 1. The support mounting base 16 is provided to facilitate mounting and fixing.
As shown in fig. 3, the end surface of the first cylindrical boss 22 is provided with a first blind hole 24. The end surface 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 arranged for buffering metal expansion caused by high hydraulic temperature of oil liquid.
The liquid level height 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 of the annular groove 21 and the lining 4, and effectively lubricates the movement of the balance valve core 2 in the lining 4.
The scheme is used for improving the moving fluency of the internal balance valve core 2.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments 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 utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (9)

1. A constant pressure device comprises a pressure regulating valve and a constant pressure device, and is characterized in that:
the pressure balancer comprises a valve body (1), a balance valve core (2) and two valve covers (3); the two valve covers (3) are respectively installed at two ends of the valve body (1) in a sealing mode through bolts;
the interior 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 close sliding fit with the inner wall of the lining (4);
the valve body (1) and the opposite side walls of one end of the lining (4) are respectively provided with a first liquid inlet hole (11) and a first liquid outlet hole (12);
a second liquid inlet hole (13) and a second liquid outlet hole (14) are respectively formed in the opposite side walls of the other end of the valve body (1) and the lining (4);
joints are arranged on 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); the axes of the first liquid outlet hole (12) and the second liquid outlet hole (14) are both 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) which penetrates 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);
and 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).
2. A constant pressure apparatus according to claim 1, wherein the cross-sectional areas of 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 the same; the area of the first liquid inlet hole (11) opposite to the first liquid outlet hole (12) is half of the cross section area of the first liquid inlet hole (11); the area of the second liquid inlet hole (13) opposite to the second liquid outlet hole (14) is half of the cross section area of the second liquid inlet hole (13).
3. A pressure balancing device according to claim 1, wherein a support mounting seat (16) is mounted at each end of the valve body (1).
4. A constant pressure device according to claim 1, characterized in that the annular groove (21) has a C-shaped cross-section.
5. A pressure balancing device according to claim 1, characterized in that a return spring (6) is provided between the two valve covers (3) and the two ends of the balancing valve core (2); two ends of the reset spring (6) are respectively sleeved on the first cylindrical boss (22) and the second cylindrical boss (31) in an inserting manner.
6. The pressure balancing device according to claim 1, wherein both ends of the pressure balancing 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 slot (23) is of a V-shaped structure.
7. A pressure-balancing device according to claim 1, wherein the first cylindrical boss (22) has a blind first bore (24) formed in its end face.
8. A pressure-balancing device according to claim 1, characterised in that the second cylindrical boss (31) is provided with a second blind bore (32) in its end face.
9. A pressure balancing device according to claim 1, characterized in that the level of the lubricating oil between the annular groove (21) and the inner lining (4) is 1/3-2/3 of the diameter of the balancing valve cartridge (2).
CN202210930546.1A 2022-08-04 2022-08-04 Constant pressure device Active CN115289258B (en)

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CN115289258B CN115289258B (en) 2024-05-28

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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
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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