CN112727827A - Slide valve steady state hydrodynamic force and valve port throttling coefficient measuring device - Google Patents
Slide valve steady state hydrodynamic force and valve port throttling coefficient measuring device Download PDFInfo
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- CN112727827A CN112727827A CN202011566327.7A CN202011566327A CN112727827A CN 112727827 A CN112727827 A CN 112727827A CN 202011566327 A CN202011566327 A CN 202011566327A CN 112727827 A CN112727827 A CN 112727827A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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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
- 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
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/855—Testing of fluid pressure systems
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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention belongs to the technical field of mechanical engineering, and discloses a device for measuring steady-state hydrodynamic force and valve port throttling coefficient of a slide valve, wherein the measured slide valve comprises a valve body, a valve sleeve and a slide valve core; the right mandril of the precession assembly is propped against the right end of the spool valve of the slide valve, and the left mandril of the measurement assembly is propped against the left end of the spool valve of the slide valve. The device can realize simultaneous measurement of pressure and flow, improves the measurement efficiency, can ensure no leakage of oil, and improves the safety during measurement.
Description
Technical Field
The invention belongs to the technical field of mechanical measurement engineering, and relates to a device for measuring steady-state hydrodynamic force of a slide valve and a valve port throttling coefficient.
Background
The slide valve is a key basic element of the hydraulic system, and the size of a throttling window between the valve core and the valve sleeve is changed by controlling the displacement of the valve core, so that the accurate control of flow and pressure is realized; the accurate value of the valve port throttling coefficient is obtained, and the key of the valve core rated displacement design is. In addition, when the throttling window is in an open state, the slide valve is acted by steady-state hydraulic force due to the change of the momentum of liquid flow, so that the throttling window is prevented from being opened; when the slide valve is driven, the action of steady-state hydraulic force needs to be overcome, so that the definition of the vice steady-state hydraulic force value of the slide valve is important for the design of the whole valve.
Disclosure of Invention
In order to solve the problems, the invention provides a device for measuring the steady-state hydrodynamic force and the valve port throttling coefficient of a slide valve, which aims at solving the problems that the current slide valve is inconvenient to measure the steady-state hydrodynamic force and the throttling coefficient and lacks accurate data; the valve core of the slide valve is pushed to move by the precession screw and the dial indicator displays the movement displacement of the valve core of the slide valve, the opening variation of the valve port is measured, and the throttling coefficient of the valve port and the steady-state hydrodynamic force value of the slide valve can be calculated by combining the flow of the valve port.
The technical scheme of the invention is as follows:
a slide valve steady state hydrodynamic force and valve port throttle coefficient measuring device, the slide valve measured includes valve block, valve pocket and slide valve core, this apparatus includes precession assembly and measuring assembly, the precession assembly includes right briquetting, right end cap, precession screw and right knockout pin; the measuring assembly comprises a left pressing block, a left ejector rod, a spring seat and a dial indicator;
the right pressing block is internally provided with a cavity, a screw-in screw is in threaded connection with a right end cover, the right end cover is arranged at the right end of the right pressing block, the threaded end of the screw-in screw can be inserted into the right pressing block in a screw-in manner and can push a right mandril in the right pressing block to move to the left, and the left end of the right pressing block is provided with a sealing cover plate;
a cavity is formed in the left pressing block, one end of a left ejector rod is arranged in the cavity of the left pressing block, the other end of the left ejector rod extends out of the left pressing block, and one end of the left ejector rod in the cavity of the left pressing block is in contact with a measuring rod of the dial indicator; a spring is sleeved on the contact part of the left ejector rod and the dial indicator measuring rod;
an oil through hole is reserved on the right pressing block and the left pressing block, a right mandril of the precession assembly props against the right end of a spool of the sliding valve, and a left mandril of the measuring assembly props against the left end of the spool of the sliding valve.
Furthermore, the contact ends of the right pressing block and the left pressing block with the slide valve body are respectively provided with a sealing cover plate.
Furthermore, the screw-in component also comprises an anti-rotation head and an anti-rotation insertion block; the lateral surface of the right pressing block is provided with a transverse long groove, one end of the anti-rotation inserting block is arranged on the transverse long groove, the other end of the anti-rotation inserting block is contacted with the right end of the right ejector rod, and the right end of the anti-rotation inserting block is contacted with the screw through the anti-rotation head. The structure limits the rotation of the anti-rotation insert block around the axial direction of the spool of the sliding valve, prevents the rotation of the precession screw from being transmitted to the spool of the sliding valve through the friction force between the pressing surfaces, avoids the influence of the rotation of the spool on the measuring result, and improves the measuring precision.
Furthermore, the measuring assembly also comprises a locking ring, a spring seat and a nut; the left end of the left pressing block is installed on the nut and fastened through a locking ring which is connected to the left pressing block in a threaded mode, a through hole is formed in the left end of the nut of the bearing spring seat at the right end of the nut, and a measuring rod of the dial indicator penetrates through the through hole of the nut to be in contact with the left ejector rod.
Furthermore, a compression ring is arranged between the measuring rod and the screw cap of the dial indicator.
Furthermore, the device also comprises fastening screws, when the device is used, the screwing component and the measuring component are respectively arranged on the left side and the right side of the slide valve body, and then the screwing component and the measuring component are connected by a plurality of fastening screws.
Furthermore, when the device is used for measuring the hydraulic power of the steady-state slide valve, the oil through port on the left pressing block is communicated with return oil, oil with certain pressure is introduced to the oil through port of the right pressing block, and the screw-in screw is unscrewed to be separated from the right ejector rod; under the action of oil pressure, the spool of the slide valve moves to the right, the pressure change value delta PL of the oil through opening of the right press block and the valve port opening change delta S read by a corresponding dial indicator are read, and on the basis of the known spring stiffness value kv and the valve spool end surface area AV, the steady-state hydraulic force value FS of the slide valve can be calculated:
FS＝ΔPL·AV-kv·ΔS。
furthermore, when the device is used for measuring the throttling coefficient of the sliding valve, the oil through holes in the right pressing block and the left pressing block are blocked, the screw-in screw is rotated to enable the right mandril to move leftwards so as to push the valve core of the sliding valve to move leftwards, then the movement displacement of the valve core of the sliding valve is displayed through a dial indicator, and the opening variation delta S of the valve port is measured; meanwhile, the variable quantity delta Q of the flow of the slide valve is measured through an external flowmeter, the differential pressure delta P on two sides of the throttle opening of the slide valve is read through an external pressure gauge, and then the valve port throttle coefficient Cd can be calculated according to the known area gradient W and the medium density rho of the slide valve pair:
compared with the prior art, the invention has the following advantages and beneficial effects:
1. oil through holes with axial seals and mounting threads are reserved on the right pressing block and the left pressing block, and can be used as pressure measuring interfaces and also can be used for introducing high-pressure oil; meanwhile, the throttling flow of the sliding valve pair can be measured in an external flow meter manner; the pressure and the flow are measured simultaneously, and the measuring efficiency is improved.
2. According to the invention, the axial static seal is arranged between the sealing cover plate and the valve sleeve, the end surface static seal is arranged between the sealing cover plate and the right pressing block, the end surface static seal is arranged between the sealing cover plate and the left pressing block, the axial dynamic seal is arranged between the right pressing block and the right ejector rod, and the axial dynamic seal is arranged between the left pressing block and the left ejector rod, so that oil leakage can be prevented, and the safety during measurement is improved.
3. The anti-rotation inserting block is arranged, so that the rotation of the screw-in screw is isolated from being transmitted to the spool of the slide valve through the friction force between the pressing surfaces, the influence of the rotation of the spool on a measuring result is avoided, and the measuring precision is improved.
Drawings
FIG. 1 is a cross-sectional view of a slide valve steady state hydrodynamic force and valve port throttling coefficient measuring device of the present invention;
FIG. 2 is a top view of the slide valve steady state hydrodynamic force and valve port throttling coefficient measuring device of the present invention;
wherein: the device comprises a right pressing block 1, a right end cover 2, a precession screw 3, an anti-rotation head 4, an anti-rotation inserting block 5, a right ejector rod 6, a sealing cover plate 7, a left pressing block 8, a left ejector rod 9, a locking ring 10, a spring 11, a spring seat 12, a dial indicator 13, a pressing ring 14, a nut 15, a valve body 16, a valve sleeve 17, a slide valve core 18 and a fastening screw 19.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings.
A slide valve steady state hydrodynamic force and valve port throttle coefficient measuring device, the slide valve measured includes valve block 16, valve pocket 17 and slide valve core 18, this apparatus includes precession assembly and measuring assembly, the precession assembly includes right briquetting 1, right end cap 2, precession screw 3 and right knockout pin 6; the measuring assembly comprises a left pressing block 8, a left ejector rod 9, a spring 11, a spring seat 12 and a dial indicator 13;
the right pressing block 1 is internally provided with a cavity, a screw-in screw 3 is in threaded connection with a right end cover 2, the right end cover 2 is arranged at the right end of the right pressing block 1, the threaded end of the screw-in screw 3 can be screwed into the right pressing block 1 and can push a right mandril 6 in the right pressing block 1 to move to the left, and the left end of the right pressing block 1 is provided with a sealing cover plate 7;
a cavity is formed in the left pressing block 8, one end of a left ejector rod 9 is arranged in the cavity of the left pressing block 8, the other end of the left ejector rod 9 extends out of the left pressing block 8, and one end of the left ejector rod 9 in the cavity of the left pressing block 8 is in contact with a measuring rod of a dial indicator 13; a spring 11 is sleeved on the contact part of the left ejector rod 9 and the measuring rod of the dial indicator 13;
the right mandril 6 of the screwing-in assembly is propped against the right end of a spool valve 18 of the slide valve, and the left mandril 9 of the measuring assembly is propped against the left end of the spool valve 18 of the slide valve.
The contact ends of the right pressing block 1 and the left pressing block 8 and the slide valve body 16 are respectively provided with a sealing cover plate 7.
The precession assembly also comprises an anti-rotation head 4 and an anti-rotation insertion block 5; the side surface of the right pressing block 1 is provided with a transverse long groove, one end of an anti-rotation insert block 5 is arranged on the transverse long groove, the other end of the anti-rotation insert block 5 is in contact with the right end of the right ejector rod 6, and the right end of the anti-rotation insert block 5 is in contact with the screw-in screw 3 through an anti-rotation head 4.
The measuring assembly further comprises a locking ring 10, a spring seat 12 and a nut 15; the left end of the left pressing block 8 is installed on the nut 15 and is fastened through the locking ring 10 which is connected to the left pressing block 8 through threads, the left end of the nut 15 is provided with a through hole, the right end of the nut 15 bears the spring seat 12, the left end of the nut 15 is provided with a through hole, and the measuring rod of the dial indicator 13 penetrates through the through hole of the nut 15 to be in contact with the left ejector rod.
A press ring 14 is arranged between the measuring rod of the dial indicator 13 and the screw cap 15.
And fastening screws 19 are further included, and when the device is used, the screwing component and the measuring component are respectively arranged on the left side and the right side of the slide valve body 16, and then the screwing component and the measuring component are connected by a plurality of fastening screws 19.
The valve barrel 17 is installed in the hole of the valve body 16, the slide valve spool 18 is installed in the hole of the valve barrel 17, the sealing cover plate 17 is installed on two sides of the valve body 16, the right pressing block 1 is installed on the outer side of the right sealing cover plate 17, the right ejector rod 6 is inserted into the hole of the right pressing block 1, the anti-rotation inserting block 5 and the anti-rotation head 4 are sequentially overlapped and installed on the right ejector rod 6, the right end cover 2 is installed on the right side of the right pressing block 1, the right pressing block 1 is fastened through screws, the precession screw 3 is screwed in through the threads on the right end cover 2, and the precession screw.
The left pressing block 8 is arranged on the outer side of the left sealing cover plate 17, the left ejector rod 9 is inserted into an inner hole of the left pressing block 8, the spring 11 is arranged on the end face of the left ejector rod 9, and the spring seat 12 is arranged on the left side of the spring 11; the compression ring 14 and the dial indicator 13 are arranged in an inner hole of the nut 15 through radial interference fit and fixedly connected into a whole without relative movement; the locking ring 10 is screwed into the external thread on the left pressing block 8, the nut 15 is also connected with the external thread on the left pressing block 8, and the locking ring 10 ensures that the nut 15 is locked without loosening; the fastening screw 19 passes through the mounting holes on the left pressing block 8 and the right pressing block 1 to ensure that the left pressing block 8, the right pressing block 1 and the two side sealing cover plates 7 are tightly pressed on the valve body 16; under the action of the force of the spring 11, the spool valve 18 of the slide valve is kept pressed with the left mandril 9, and the displacement of the spool valve 18 of the slide valve is displayed as the reading of the dial indicator 13.
Oil through holes are reserved on the right pressing block 1 and the left pressing block 8, and can be used as pressure measuring connectors or high-pressure oil can be introduced.
An axial static seal is arranged between the sealing cover plate 7 and the valve sleeve 17, an end face static seal is arranged between the sealing cover plate 7 and the right pressing block 1, an end face static seal is arranged between the sealing cover plate 7 and the left pressing block 8, an axial dynamic seal is arranged between the right pressing block 1 and the right ejector rod 6, and an axial dynamic seal is arranged between the left pressing block 8 and the left ejector rod 9, so that oil-free leakage can be ensured.
The anti-rotation insert block 5 is inserted into the square groove of the right pressing block 1, so that the anti-rotation insert block 5 is limited to rotate around the axial direction of the spool valve 18 of the sliding valve, the rotation of the precession screw 3 is isolated and transmitted to the spool valve 18 of the sliding valve through the friction force between the pressing surfaces, the influence of the rotation of the spool valve on a measuring result is avoided, and the measuring precision is improved.
The measuring device for the steady-state hydrodynamic force and the valve port throttling coefficient of the slide valve can be used for measuring the steady-state hydrodynamic force and the throttling coefficient of the slide valve, as shown in figures 1 and 2.
When the throttle coefficient of the slide valve is measured, the oil through holes on the right pressing block 1 and the left pressing block 8 are blocked by plugs. Adjusting the positions of a nut 15 and a locking ring 10 to ensure that a spring 11 keeps a compressed state, so that the left ejector rod 9 and the spool valve 18 are always kept in contact and pressed, adjusting the axial position of a dial indicator 13, so that a measuring head of the dial indicator 13 is in contact with the left ejector rod 9, displaying the movement displacement of the spool valve 18 through the dial indicator 13, and measuring the opening change delta S of a valve port; the slide valve core (18) is pushed to move by screwing in the screw (3); meanwhile, the variable quantity delta Q of the flow of the slide valve is measured through an external flowmeter, the differential pressure delta P on two sides of the throttle opening of the slide valve is read through an external pressure gauge, and the valve port throttle coefficient Cd can be calculated according to the known area gradient W and the medium density rho of the slide valve pair
When the steady-state hydraulic power of the slide valve is measured, an oil through hole on the left pressing block 8 is communicated with return oil, oil with certain pressure is introduced to an oil through hole of the right pressing block (1), and meanwhile, the screw-in screw (3) is unscrewed, so that the screw-in screw (3) is separated from the left ejector rod (6); under the action of oil pressure, a spool (18) of the slide valve moves to the left, a pressure change value delta PL of an oil through port of a right press block (1) and a valve port opening change delta S read by a corresponding dial indicator (13) are read, and a steady-state hydraulic force value FS of the slide valve can be calculated on the basis of the stiffness value kv of a known spring (11) and the end surface area AV of the spool
FS＝ΔPL·AV-kv·ΔS
The embodiments described above are intended to facilitate one of ordinary skill in the art in understanding and using the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (8)
1. A device for measuring the steady-state hydrodynamic force of a slide valve and the throttling coefficient of a valve port is characterized in that the measured slide valve comprises a valve body (16), a valve sleeve (17) and a slide valve core (18), the device comprises a precession assembly and a measuring assembly, and the precession assembly comprises a right pressing block (1), a right end cover (2), a precession screw (3) and a right mandril (6); the measuring assembly comprises a left pressing block (8), a left ejector rod (9), a spring (11), a spring seat (12) and a dial indicator (13);
the right pressing block (1) is internally provided with a cavity, a precession screw (3) is in threaded connection with a right end cover (2), the right end cover (2) is arranged at the right end of the right pressing block (1), the threaded end of the precession screw (3) can be inserted into the right pressing block (1) in a precession mode and can push a right mandril (6) in the right pressing block (1) to move to the left side, and the left end of the right pressing block (1) is provided with a sealing cover plate (7);
a cavity is formed in the left pressing block (8), one end of a left ejector rod (9) is arranged in the cavity of the left pressing block (8), the other end of the left ejector rod extends out of the left pressing block (8), and one end of the left ejector rod (9) in the cavity of the left pressing block (8) is in contact with a measuring rod of a dial indicator (13); a spring (11) is sleeved on the contact part of the left ejector rod (9) and the measuring rod of the dial indicator (13);
oil through holes are reserved on the right pressing block (1) and the left pressing block (8), a right mandril (6) of the precession assembly props against the right end of a slide valve core (18) of the slide valve, and a left mandril (9) of the measuring assembly props against the left end of the slide valve core (18) of the slide valve.
2. The device for measuring the steady-state hydrodynamic force of the sliding valve and the throttling coefficient of the valve port of the sliding valve according to claim 1, wherein the contact ends of the right pressing block (1) and the left pressing block (8) and the valve body (16) of the sliding valve are respectively provided with a sealing cover plate (7).
3. The device for measuring the steady-state hydrodynamic force of the slide valve and the throttling coefficient of the valve port according to claim 1, wherein the precession assembly further comprises an anti-rotation head (4) and an anti-rotation insert (5); the lateral surface of the right pressing block (1) is provided with a transverse long groove, one end of an anti-rotation inserting block (5) is arranged on the transverse long groove, the other end of the anti-rotation inserting block (5) is in contact with the right end of the right ejector rod (6), and the right end of the anti-rotation inserting block (5) is in contact with the precession screw (3) through an anti-rotation head (4).
4. The device for measuring the steady-state hydrodynamic force of the sliding valve and the throttling coefficient of the valve port according to claim 1, wherein the measuring assembly further comprises a locking ring (10), a spring seat (12) and a nut (15); the left end of the left pressing block (8) is installed on the nut (15) and is fastened through a locking ring (10) which is connected to the left pressing block (8) through threads, a through hole is formed in the right end of the nut (15) and bears the spring seat (12), and the left end of the nut (15) is provided with a measuring rod of the dial indicator (13) which penetrates through the through hole of the nut (15) to be in contact with the left ejector rod (9).
5. The device for measuring the steady-state hydrodynamic force of the sliding valve and the throttling coefficient of the valve port of the sliding valve according to claim 4, characterized in that a pressure ring (14) is further arranged between the measuring rod of the dial indicator (13) and the screw cap (15).
6. The device for measuring the steady-state hydrodynamic force of the sliding valve and the throttling coefficient of the valve port of the sliding valve according to claim 1, which is characterized by further comprising fastening screws (19), wherein when the device is used, the screwing assembly and the measuring assembly are respectively arranged on the left side and the right side of the valve body (16) of the sliding valve, and then the screwing assembly and the measuring assembly are connected by a plurality of fastening screws (19).
7. The device for measuring the steady-state hydraulic power of the sliding valve and the throttling coefficient of the valve port according to claim 1, is characterized in that when the device is used for measuring the steady-state hydraulic power of the sliding valve, an oil through hole on a left pressing block (8) is communicated with return oil, oil with certain pressure is introduced into an oil through hole on a right pressing block (1), and meanwhile, a screw-in screw (3) is unscrewed to separate the screw-in screw (3) from a right ejector rod (6); under the action of oil pressure, a spool (18) of the slide valve moves to the right, a pressure change value delta PL of an oil through port of a right press block (1) and a valve port opening change quantity delta S read by a corresponding dial indicator (13) are read, and a steady-state hydraulic force value FS of the slide valve can be calculated on the basis of a known stiffness value kv of a spring (11) and an end surface area AV of the spool:
FS＝ΔPL·AV-kv·ΔS。
8. the device for measuring the steady-state hydrodynamic force of the sliding valve and the throttling coefficient of the valve port according to claim 1 is characterized in that when the device is used for measuring the throttling coefficient of the sliding valve, oil through holes in a right pressing block (1) and a left pressing block (8) are blocked, a screw-in screw (3) is rotated to enable a right mandril (6) to move leftwards, a valve core (18) of the sliding valve is pushed to move leftwards, then the movement displacement of the valve core (18) of the sliding valve is displayed through a dial indicator (13), and the opening change quantity delta S of the valve port is measured; meanwhile, the variable quantity delta Q of the flow of the slide valve is measured through an external flowmeter, the differential pressure delta P on two sides of the throttle opening of the slide valve is read through an external pressure gauge, and then the valve port throttle coefficient Cd can be calculated according to the known area gradient W and the medium density rho of the slide valve pair:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011566327.7A CN112727827B (en) | 2020-12-25 | 2020-12-25 | Device for measuring steady-state hydrodynamic force and valve port throttling coefficient of slide valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011566327.7A CN112727827B (en) | 2020-12-25 | 2020-12-25 | Device for measuring steady-state hydrodynamic force and valve port throttling coefficient of slide valve |
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| Publication Number | Publication Date |
|---|---|
| CN112727827A true CN112727827A (en) | 2021-04-30 |
| CN112727827B CN112727827B (en) | 2023-08-01 |
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| CN202011566327.7A Active CN112727827B (en) | 2020-12-25 | 2020-12-25 | Device for measuring steady-state hydrodynamic force and valve port throttling coefficient of slide valve |
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| CN112727827B (en) | 2023-08-01 |
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