WO2022227244A1 - Flow-adaptive guide vane adjustment device based on hydraulic transmission - Google Patents

Flow-adaptive guide vane adjustment device based on hydraulic transmission Download PDF

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Publication number
WO2022227244A1
WO2022227244A1 PCT/CN2021/100277 CN2021100277W WO2022227244A1 WO 2022227244 A1 WO2022227244 A1 WO 2022227244A1 CN 2021100277 W CN2021100277 W CN 2021100277W WO 2022227244 A1 WO2022227244 A1 WO 2022227244A1
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WO
WIPO (PCT)
Prior art keywords
guide vane
pump
interface
hydraulic
piston
Prior art date
Application number
PCT/CN2021/100277
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French (fr)
Chinese (zh)
Inventor
李辉
周岭
施卫东
薛鹏
韩勇
李伟
常浩
朱勇
Original Assignee
江苏大学
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Publication date
Application filed by 江苏大学 filed Critical 江苏大学
Priority to GB2212248.5A priority Critical patent/GB2608721B/en
Publication of WO2022227244A1 publication Critical patent/WO2022227244A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/466—Fluid-guiding means, e.g. diffusers adjustable especially adapted for liquid fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0027—Varying behaviour or the very pump
    • F04D15/0038—Varying behaviour or the very pump by varying the effective cross-sectional area of flow through the rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
    • F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/54—Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/51—Inlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/52—Outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/60—Control system actuates means
    • F05D2270/64—Hydraulic actuators
    • 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

Definitions

  • the invention belongs to the technical field of water pumps, in particular to a flow self-adaptive guide vane adjustment device based on hydraulic transmission.
  • Vane pumps As a general-purpose machine, pumps are widely used in various fields of the national economy. According to statistics, the power consumption of pumps accounts for about 20% of the country's total power generation. Vane pumps include centrifugal pumps, mixed flow pumps and axial flow pumps. They are the most widely used pumps due to their wide range of flow and lift, uniform flow, simple structure and easy operation. Therefore, it is of great significance to improve the efficiency of the vane pump, reduce energy consumption, save energy and reduce emissions.
  • the vane pump deviates from the design condition, and the vane inlet placement angle of the impeller and guide vane is inconsistent with the flow angle of the incoming flow, which increases the impact loss, destroys the flow stability, and reduces the operation efficiency.
  • the usual method is to install movable guide vanes before the impeller inlet or after the impeller outlet, and adjust the angle of the movable guide vanes to reduce the inconsistency between the liquid flow angle and the blade placement angle.
  • turbulence loss reduce hydraulic loss to improve pump efficiency and stability.
  • the adjustment of the opening of the movable guide vane depends on experience for manual adjustment, the adjustment workload is large, the degree of automation is low, and it is difficult to adjust in real time according to changes in operating conditions.
  • Some use modules such as flow monitoring unit, single-chip control unit, stepper motor and angle sensor to realize real-time adjustment according to flow, so that the guide vane is at the optimal opening degree under different flow rates, and improve the operating efficiency of the pump, but the technical route is complicated and auxiliary equipment is required. Numerous, high cost and low reliability.
  • the purpose of the present invention is to solve the problems in the prior art that the pump without movable guide vanes has low efficiency under non-design conditions, and the automatic adjustment device of the pump with movable guide vanes is complicated and low in reliability.
  • the present invention provides a flow self-adaptive guide vane adjustment device based on hydraulic transmission, comprising: a venturi tube, a hydraulic cylinder, and a hydraulic tube;
  • the venturi tube includes: an inlet section, a constricted section, a throat, and a diffusion section; the inlet section and the throat are respectively provided with an inlet section interface and a throat interface;
  • the hydraulic cylinder includes: a cylinder body, a piston, a piston rod, and a spring; the piston rod and the piston are assembled into one body; the piston is installed in the cylinder body, and the two ends of the piston rod pass through the two ends of the cylinder body and extend.
  • both sides of the cylinder body are also provided with a first interface of a hydraulic cylinder and a second interface of the hydraulic cylinder, the first interface of the hydraulic cylinder
  • the inside of the second interface of the hydraulic cylinder and the second interface of the hydraulic cylinder are respectively connected with the first cavity of the hydraulic cylinder and the second cavity of the hydraulic cylinder, and the outside of the first interface of the hydraulic cylinder and the second interface of the hydraulic cylinder are respectively connected with the inlet section through the hydraulic pipe.
  • the spring is installed on the piston rod; the flow change will cause the pressure difference between the inlet section interface and the throat interface to change, and the pressure difference is transmitted to both sides of the piston, causing the piston and the The rod moves along the axis of the cylinder to change the expansion and contraction amount of the spring, so that the piston and the piston rod reach a new equilibrium position.
  • the hydraulic drive-based flow adaptive guide vane adjustment device of the present invention further includes a pump and a movable guide vane adjustment mechanism;
  • the pump includes an impeller, a pump body, and a shaft;
  • the venturi tube is installed at the outlet of the pump , the position of the hydraulic cylinder is fixed relative to the pump, the movable guide vane adjustment mechanism is installed on the pump;
  • the piston rod is connected with the movable guide vane adjustment mechanism, and the movement of the piston rod can be passed through the movable guide vane adjustment mechanism It is transmitted to the movable guide vane to realize the adjustment of the opening of the movable guide vane.
  • the hydraulic transmission-based flow adaptive guide vane adjustment device of the present invention further includes a cam mechanism, and the cam mechanism includes a cam, a follower, and a frame; the cam is connected with the piston rod; the cam is A closed-shaped moving cam with a groove on it; the follower is arranged in a frame, and the frame restricts the movement of the follower, so that the follower can only reciprocate in a straight line in one direction, the A roller is installed at the end of the follower, and the roller is arranged in the cam groove; the movement of the piston rod will drive the cam to move and cause the follower to reciprocate linearly in the direction restricted by the frame.
  • the cam mechanism includes a cam, a follower, and a frame; the cam is connected with the piston rod; the cam is A closed-shaped moving cam with a groove on it; the follower is arranged in a frame, and the frame restricts the movement of the follower, so that the follower can only reciprocate in a straight line in one direction, the A roller is installed at
  • the hydraulic drive-based flow adaptive guide vane adjustment device of the present invention further includes a pump and a movable guide vane adjustment mechanism;
  • the pump includes an impeller, a pump body, and a shaft;
  • the venturi tube is installed at the outlet of the pump , the position of the hydraulic cylinder is fixed relative to the pump, and the movable guide vane adjustment mechanism is installed on the pump;
  • the cam mechanism follower is connected with the movable guide vane adjustment mechanism, and the movement of the follower can pass through the movable guide vane adjustment mechanism It is transmitted to the movable guide vane to realize the adjustment of the opening of the movable guide vane.
  • the movable guide vanes are installed before the impeller inlet of the pump and/or after the impeller outlet of the pump.
  • the pressure taking port of the inlet section interface is arranged on the wall surface of the inlet section, and the pressure taking port is perpendicular to the flow direction, so as to obtain the static pressure of the inlet section.
  • the pressure taking port of the interface of the inlet section extends into the center of the inlet section through the elbow, and the pressure taking port is facing the direction of the incoming flow, so as to obtain the total pressure of the inlet section.
  • the device for automatically adjusting the movable guide vanes of the pump according to the flow rate is one or more sets.
  • the pump is a centrifugal pump, a mixed flow pump or an axial flow pump.
  • the present invention can automatically adjust the opening of the guide vane according to the flow rate of the pump.
  • the flow pre-swirl can be changed by adjusting the angle of the guide vane to reduce the impeller inlet impact loss under different working conditions;
  • the difference can be reduced by adjusting the angle of the guide vane.
  • the angle of attack at the inlet of the guide vane under working conditions reduces the hydraulic loss. Improve the operating efficiency of the pump under non-design conditions and widen the efficient operating range of the pump;
  • Hydraulic transmission which can amplify the liquid pressure to obtain sufficient power
  • FIG. 1 is a perspective view of Embodiment 1 of the flow adaptive guide vane adjusting device based on hydraulic transmission of the present invention
  • Embodiment 1 is a plan view of Embodiment 1 of the flow adaptive guide vane adjustment device based on hydraulic transmission of the present invention
  • Fig. 3 is the A-A sectional view of Embodiment 1 of the flow adaptive guide vane adjustment device based on hydraulic transmission of the present invention
  • Embodiment 4 is a B-B cross-sectional view of Embodiment 1 of the flow adaptive guide vane adjustment device based on hydraulic transmission of the present invention
  • Fig. 5 is the schematic diagram that the pressure taking port of the inlet section interface is facing the incoming flow direction
  • Fig. 6 is the schematic diagram of the vertical flow direction of the pressure taking port of the inlet section interface
  • FIG. 7 is a schematic structural diagram of a closed-type moving cam mechanism
  • Figure 8 is a schematic structural diagram of a hydraulic cylinder
  • Fig. 9 is the schematic diagram of Embodiment 2 of the flow adaptive guide vane adjusting device based on hydraulic transmission of the present invention.
  • Fig. 10 is a partial enlarged view of Embodiment 2 of the flow adaptive guide vane adjustment device based on hydraulic transmission of the present invention
  • FIG. 11 is a schematic diagram of Embodiment 3 of the flow adaptive guide vane adjustment device based on hydraulic transmission of the present invention.
  • the flow adaptive guide vane adjustment device based on hydraulic transmission of the present invention is a set. It includes: Venturi tube 1, hydraulic cylinder 2, hydraulic tube 4; the Venturi tube 1 includes: an inlet section 11, a constriction section 12, a throat section 13, a diffuser section 14; the inlet section 11 and the throat section 13 The inlet section interface 15 and the throat interface 16 are respectively provided;
  • the hydraulic cylinder 2 includes: a cylinder block 24, a piston 23, a piston rod 21, and a spring 29; the piston rod 21 and the piston 23 are assembled into one body; the piston 23 is installed in the cylinder In the body 24, the space in the cylinder body 24 is divided into the first cavity 27 of the hydraulic cylinder and the second cavity 28 of the hydraulic cylinder; the two ends of the piston rod 21 pass through the two ends of the cylinder 24 and extend to Outside the cylinder body 24, the piston 23 and the piston rod 21 can reciprocate linearly along the axis of the cylinder body 24; the cylinder body 24 is also provided with a first hydraulic cylinder interface 25 and a hydraulic cylinder second interface on both sides 26.
  • the first interface 25 of the hydraulic cylinder and the second interface 26 of the hydraulic cylinder are communicated with the first cavity 27 of the hydraulic cylinder and the second cavity 28 of the hydraulic cylinder respectively, and the first interface 25 of the hydraulic cylinder and the second hydraulic cylinder are respectively connected.
  • the outside of the interface 26 is communicated with the inlet section interface 15 and the throat interface 16 through the hydraulic pipe 4 respectively; the spring 29 is installed on the piston rod 21; flow changes will lead to the inlet section interface 15 and the throat section.
  • the pressure difference between the ports 16 changes and is transmitted to both sides of the piston 23 through the hydraulic pipe 4, causing the piston 23 and the piston rod 21 to move along the axis of the cylinder 24, changing the expansion and contraction of the spring 29,
  • the piston 23 and the piston rod 21 are brought to a new equilibrium position.
  • the present invention also includes a cam mechanism, which includes a cam 3, a follower 33, and a frame 34; the cam 3 is connected with the piston rod 21; the cam 3 is of a closed type
  • the moving cam is provided with a groove 31; the follower 33 is arranged in the frame 34, and the frame 34 restricts the movement of the follower 33, so that the follower 33 can only move along the A linear reciprocating motion is performed in one direction, and a roller 32 is installed at the end of the follower 33, and the roller 32 is arranged in the cam groove 31; the movement of the piston rod 21 will drive the cam 3 to move, and
  • the follower 33 is caused to perform linear reciprocating motion along the direction restricted by the frame 34 .
  • the present invention also includes a pump and a movable guide vane adjusting mechanism;
  • the pump is a centrifugal pump, including an impeller 7, a pump body 5, a shaft 8, and a pump cover 9;
  • the venturi tube 1 is installed at the outlet of the pump, and the The position of the hydraulic cylinder 2 is fixed relative to the pump;
  • the movable guide vane adjustment mechanism is installed before the inlet of the impeller 7, and is mainly composed of a rack 63, a gear 64, a gear shaft 67, a driving bevel gear 68, a bevel gear plate 65,
  • the driven bevel gear 62, the guide vane shaft 61, the front guide vanes 66 and the guide vane chamber 6 are composed of six front guide vanes 66;
  • the cam mechanism follower 33 is connected to the rack 63, and the rack 63 is connected to the gear 64 meshing drives the driving bevel gear 68 and the front guide vane 66 to rotate through the gear shaft 67, the driving bevel gear
  • the pressure taking port of the inlet section interface 15 extends into the center of the inlet section 11 through an elbow, facing the inflow direction, so as to obtain the total pressure of the inlet section 11 .
  • two sets of the flow adaptive guide vane adjustment device based on hydraulic transmission of the present invention are used at the same time. It includes: Venturi tube 1, hydraulic cylinder 2, hydraulic tube 4; the Venturi tube 1 includes: an inlet section 11, a constriction section 12, a throat section 13, a diffuser section 14; the inlet section 11 and the throat section 13
  • the inlet section interface 15 and the throat interface 16 are respectively provided; the inlet section tee 17 and the throat tee 18 are respectively installed outside the inlet section interface 15 and the throat interface 16; as shown in FIG.
  • the hydraulic cylinder 2 includes: a cylinder 24, a piston 23, a piston rod 21, and a spring 29; the piston rod 21 is assembled with the piston 23; the piston 23 is installed in the cylinder 24, and the The space is divided into the first cavity 27 of the hydraulic cylinder and the second cavity 28 of the hydraulic cylinder; the two ends of the piston rod 21 pass through the two ends of the cylinder 24 and extend to the outside of the cylinder 24, and the piston 23 and the piston rod 21 can do linear reciprocating motion along the axis of the cylinder body 24; both sides of the cylinder body 24 are also provided with a hydraulic cylinder first interface 25 and a hydraulic cylinder second interface 26,
  • the first interface 25 of the hydraulic cylinder and the second interface 26 of the hydraulic cylinder are communicated with the first cavity 27 of the hydraulic cylinder and the second cavity 28 of the hydraulic cylinder respectively.
  • the first interface 25 of the hydraulic cylinder and the second interface 26 of the hydraulic cylinder The outside is communicated with the inlet tee 17 and the throat tee 18 through the hydraulic pipe 4 respectively; the spring 29 is installed on the piston rod 21; flow changes will cause the inlet tee 17 and the throat
  • the pressure difference between the tee 18 changes, and is transmitted to both sides of the piston 23 through the hydraulic pipe 4, causing the piston 23 and the piston rod 21 to move along the axis of the cylinder 24, changing the expansion and contraction of the spring 29 amount, so that the piston 23 and the piston rod 21 reach a new equilibrium position.
  • the present invention also includes a cam mechanism, which includes a cam 3, a follower 33, and a frame 34; the cam 3 is connected with the piston rod 21; the cam 3 is of a closed type
  • the moving cam is provided with a groove 31; the follower 33 is arranged in the frame 34, and the frame 34 restricts the movement of the follower 33, so that the follower 33 can only move along the A linear reciprocating motion is performed in one direction, and a roller 32 is installed at the end of the follower 33, and the roller 32 is arranged in the cam groove 31; the movement of the piston rod 21 will drive the cam 3 to move, and
  • the follower 33 is caused to reciprocate in the direction restricted by the frame 34 .
  • the present invention also includes a pump and a movable guide vane adjusting mechanism;
  • the pump is a centrifugal pump, including an impeller 7, a pump body 5, a shaft 8, and a pump cover 9;
  • the venturi tube 1 is installed at the outlet of the pump, and the The position of the hydraulic cylinder 2 is fixed relative to the pump;
  • the movable guide vane adjustment mechanism is installed after the outlet of the impeller 7, and mainly consists of a push-pull rod 35, a control ring 101, a connecting arm 102, a guide vane sleeve 103, and a guide vane shaft 104 and guide vanes 105, the number of guide vanes is 15; one end of the push-pull rod 35 is hinged with the cam mechanism follower 33, and the other end is hinged with the control ring 101; one end of the connecting arm 102 is hinged with the control ring 101, and the other end is hinged with the guide vane
  • the sleeve 103 is hinged
  • the pressure taking port of the inlet section interface 15 extends into the center of the inlet section 11 through an elbow, facing the inflow direction, so as to obtain the total pressure of the inlet section 11 .
  • the flow adaptive guide vane adjustment device based on hydraulic transmission of the present invention is a set. It includes: Venturi tube 1, hydraulic cylinder 2, hydraulic tube 4; the Venturi tube 1 includes: an inlet section 11, a constriction section 12, a throat section 13, and a diffuser section 14; the inlet section 11 and the throat section 13 The inlet section interface 15 and the throat interface 16 are respectively provided; as shown in FIG.
  • the hydraulic cylinder 2 includes: a cylinder body 24, a piston 23, a piston rod 21, and a spring 29; the piston rod 21 and the piston 23 Assembled as a whole; the piston 23 is installed in the cylinder 24, and the space in the cylinder 24 is divided into the first cavity 27 of the hydraulic cylinder and the second cavity 28 of the hydraulic cylinder; the two ends of the piston rod 21 Passing through both ends of the cylinder 24 and extending to the outside of the cylinder 24, the piston 23 and the piston rod 21 can reciprocate linearly along the axis of the cylinder 24; There are a first interface 25 of a hydraulic cylinder and a second interface 26 of the hydraulic cylinder.
  • the first interface 25 of the hydraulic cylinder and the second interface 26 of the hydraulic cylinder are respectively connected with the first cavity 27 of the hydraulic cylinder and the second cavity 28 of the hydraulic cylinder.
  • the first interface 25 of the hydraulic cylinder and the second interface 26 of the hydraulic cylinder communicate with the inlet section interface 15 and the throat interface 16 through the hydraulic pipe 4 respectively; the spring 29 is installed on the piston rod 21
  • the flow change will cause the pressure difference between the inlet section interface 15 and the throat interface 16 to change, and the pressure difference is transmitted to both sides of the piston 23 through the hydraulic pipe 4, causing the piston 23 and the piston rod to change.
  • 21 moves along the axis of the cylinder 24 to change the expansion and contraction amount of the spring 29, so that the piston 23 and the piston rod 21 reach a new equilibrium position.
  • the present invention also includes a pump and a movable guide vane adjusting mechanism;
  • the pump is a centrifugal pump, including an impeller 7, a pump body 5, a shaft 8, and a pump cover 9;
  • the venturi tube 1 is installed at the outlet of the pump, and the The position of the hydraulic cylinder 2 is fixed relative to the pump;
  • the movable guide vane adjustment mechanism is installed before the inlet of the impeller 7, and is mainly composed of a rack 63, a gear 64, a gear shaft 67, a driving bevel gear 68, a bevel gear plate 65,
  • the driven bevel gear 62, the guide vane shaft 61, the front guide vanes 66 and the guide vane chamber 6 are composed of 6 pieces of the front guide vanes 66;
  • the piston rod 21 is connected with the rack 63, and the rack 63 and the gear 64 mesh through
  • the gear shaft 67 drives the driving bevel gear 68 and the front guide vane 66 to rotate, the driving bevel gear
  • the pressure taking port of the inlet section interface 15 is arranged on the wall surface of the inlet section 11 , which is perpendicular to the incoming flow direction, so as to obtain the static pressure of the inlet section 11 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

A flow-adaptive guide vane adjustment device based on hydraulic transmission. The device mainly comprises a Venturi pipe (1), a hydraulic cylinder (2), a cam mechanism and hydraulic pipes (4), which are used in cooperation with a pump and a movable guide vane adjustment mechanism. The Venturi pipe (1) is mounted at an outlet of the pump, and an inlet section (11) and a throat part (13) of the Venturi pipe (1) are subjected to pressure measurement, and are connected to two sides of the hydraulic cylinder (2) by means of the hydraulic pipes (4). The hydraulic cylinder (2) internally comprises a double-rod piston (23) and a spring (29), the spring (29) being mounted on a piston rod (21). The exterior of the piston rod (21) is connected to the form-closed translating cam mechanism, and a follower (33) of the cam mechanism is connected to the movable guide vane adjustment mechanism. The pressure of two sides of the piston (23) changes with a flow change; thus, the elongation of the spring (29) changes, and the cam mechanism is driven to translate. Then, the movable guide vane adjustment mechanism acts by means of the follower (33), such that the angle of a guide vane is automatically adjusted with the flow of the pump, thereby reducing the impact loss of an off-design condition, broadening a high-efficiency area of the pump, and achieving the aims of efficiency improvement and energy conservation.

Description

一种基于液压传动的流量自适应导叶调节装置A flow adaptive guide vane adjustment device based on hydraulic transmission 技术领域technical field
本发明属于水泵技术领域，特别涉及一种基于液压传动的流量自适应导叶调节装置。The invention belongs to the technical field of water pumps, in particular to a flow self-adaptive guide vane adjustment device based on hydraulic transmission.
背景技术Background technique
泵作为一种通用机械，广泛应用于国民经济的各个领域。据统计，泵的耗电量约占全国总发电量的20％。叶片泵包括离心泵、混流泵和轴流泵等，更是由于流量扬程范围广，流量均匀，结构简单、操作容易等诸多优点，是应用最广泛的泵。因此，提高叶片泵的效率，降低能耗，节能减排，具有重要意义。As a general-purpose machine, pumps are widely used in various fields of the national economy. According to statistics, the power consumption of pumps accounts for about 20% of the country's total power generation. Vane pumps include centrifugal pumps, mixed flow pumps and axial flow pumps. They are the most widely used pumps due to their wide range of flow and lift, uniform flow, simple structure and easy operation. Therefore, it is of great significance to improve the efficiency of the vane pump, reduce energy consumption, save energy and reduce emissions.
在实际工程中，运行工况复杂多变，叶片泵偏离设计工况，叶轮和导叶的叶片进口安放角与来流液流角的不一致，增加了冲击损失，破坏了流动稳定性，降低了运行效率。In actual engineering, the operating conditions are complex and changeable, the vane pump deviates from the design condition, and the vane inlet placement angle of the impeller and guide vane is inconsistent with the flow angle of the incoming flow, which increases the impact loss, destroys the flow stability, and reduces the operation efficiency.
为提高非设计工况效率，拓宽泵的高效区，通常采用的方法是在叶轮进口前或叶轮出口后安装活动导叶，通过调节活动导叶的角度减小液流角与叶片安放角不一致引起的湍流损耗，降低水力损失来提高泵效率及稳定性。但活动导叶开度的调整有的依赖经验进行人工调节，调节工作量大，自动化程度低，难以根据运行工况变化实时调节。有的采用流量监测单元、单片机控制单元、步进电机及角度传感器等模块实现了根据流量实时调节使不同流量下导叶处于最优开度，提高泵的运行效率，但技术路线复杂，辅助设备繁多，成本高，可靠性低。In order to improve the efficiency of non-design working conditions and widen the high-efficiency area of the pump, the usual method is to install movable guide vanes before the impeller inlet or after the impeller outlet, and adjust the angle of the movable guide vanes to reduce the inconsistency between the liquid flow angle and the blade placement angle. turbulence loss, reduce hydraulic loss to improve pump efficiency and stability. However, the adjustment of the opening of the movable guide vane depends on experience for manual adjustment, the adjustment workload is large, the degree of automation is low, and it is difficult to adjust in real time according to changes in operating conditions. Some use modules such as flow monitoring unit, single-chip control unit, stepper motor and angle sensor to realize real-time adjustment according to flow, so that the guide vane is at the optimal opening degree under different flow rates, and improve the operating efficiency of the pump, but the technical route is complicated and auxiliary equipment is required. Numerous, high cost and low reliability.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于解决现有技术中不带活动导叶的泵非设计工况效率低，带活动导叶的泵自动调节装置复杂，可靠性低的问题。The purpose of the present invention is to solve the problems in the prior art that the pump without movable guide vanes has low efficiency under non-design conditions, and the automatic adjustment device of the pump with movable guide vanes is complicated and low in reliability.
为实现上述目的，本发明提供一种基于液压传动的流量自适应导叶调节装置，包括：文丘里管，液压缸，液压管；In order to achieve the above purpose, the present invention provides a flow self-adaptive guide vane adjustment device based on hydraulic transmission, comprising: a venturi tube, a hydraulic cylinder, and a hydraulic tube;
所述文丘里管包括：进口段，收缩段，喉部，扩散段；所述进口段和喉部分别设置有进口段接口和喉部接口；The venturi tube includes: an inlet section, a constricted section, a throat, and a diffusion section; the inlet section and the throat are respectively provided with an inlet section interface and a throat interface;
所述液压缸包括：缸体，活塞，活塞杆，弹簧；所述活塞杆与活塞装配为一体；所述活塞安装在缸体内，所述活塞杆的两端穿过缸体两端，伸出到缸体外部，所述活塞及活塞杆可沿缸体轴线做直线往复运动；所述缸体两侧还设置有液压缸第一接口和液压缸第二接口，所述液压缸第一接口和液压缸第二接口内部分别与液压缸第一腔体和液压缸第二腔体连通，所述液压缸第一接口和液压缸第二接口外部通过所述液压管分别与所述进口段接口和喉部接口连通；所述弹簧安装在活塞杆上；流量变化会引起进口段接口和喉部接口之间的压差发生变化，所述压差传递到活塞两侧，引起所述活塞及活塞杆沿所述缸体轴线运动，改变弹簧的伸缩量，使所述活塞及活塞杆达到新的平衡位置。The hydraulic cylinder includes: a cylinder body, a piston, a piston rod, and a spring; the piston rod and the piston are assembled into one body; the piston is installed in the cylinder body, and the two ends of the piston rod pass through the two ends of the cylinder body and extend. Out of the cylinder body, the piston and the piston rod can reciprocate in a straight line along the axis of the cylinder body; both sides of the cylinder body are also provided with a first interface of a hydraulic cylinder and a second interface of the hydraulic cylinder, the first interface of the hydraulic cylinder The inside of the second interface of the hydraulic cylinder and the second interface of the hydraulic cylinder are respectively connected with the first cavity of the hydraulic cylinder and the second cavity of the hydraulic cylinder, and the outside of the first interface of the hydraulic cylinder and the second interface of the hydraulic cylinder are respectively connected with the inlet section through the hydraulic pipe. Connected with the throat interface; the spring is installed on the piston rod; the flow change will cause the pressure difference between the inlet section interface and the throat interface to change, and the pressure difference is transmitted to both sides of the piston, causing the piston and the The rod moves along the axis of the cylinder to change the expansion and contraction amount of the spring, so that the piston and the piston rod reach a new equilibrium position.
进一步的，本发明所述的基于液压传动的流量自适应导叶调节装置还包括泵和活动导叶调节机构；所述泵包括叶轮，泵体，轴；所述文丘里管安装在泵的出口，所述液压缸相对于泵位置固定，所述活动导叶调节机构安装在泵上；所述活塞杆与活动导叶调节机构连接，所述活塞杆的运动可通过所述活动导叶调节机构传递到活动导叶，实现对活动导叶开度的调节。Further, the hydraulic drive-based flow adaptive guide vane adjustment device of the present invention further includes a pump and a movable guide vane adjustment mechanism; the pump includes an impeller, a pump body, and a shaft; the venturi tube is installed at the outlet of the pump , the position of the hydraulic cylinder is fixed relative to the pump, the movable guide vane adjustment mechanism is installed on the pump; the piston rod is connected with the movable guide vane adjustment mechanism, and the movement of the piston rod can be passed through the movable guide vane adjustment mechanism It is transmitted to the movable guide vane to realize the adjustment of the opening of the movable guide vane.
进一步的，本发明所述的基于液压传动的流量自适应导叶调节装置还包括凸轮机构，所述凸轮机构包括凸轮，从动件，机架；所述凸轮与活塞杆连接；所述凸轮为形封闭型移动凸轮，上面设置有凹槽；所述从动件安置在机架内，所述机架限制从动件的运动，使从动件只能沿一个方向做直线往复运动，所述从动件端部安装有滚子，滚子安置在所述凸轮凹槽内；所述活塞杆运动会带动凸轮运动，并引起从动件沿机架限制的方向做直线往复运动。Further, the hydraulic transmission-based flow adaptive guide vane adjustment device of the present invention further includes a cam mechanism, and the cam mechanism includes a cam, a follower, and a frame; the cam is connected with the piston rod; the cam is A closed-shaped moving cam with a groove on it; the follower is arranged in a frame, and the frame restricts the movement of the follower, so that the follower can only reciprocate in a straight line in one direction, the A roller is installed at the end of the follower, and the roller is arranged in the cam groove; the movement of the piston rod will drive the cam to move and cause the follower to reciprocate linearly in the direction restricted by the frame.
进一步的，本发明所述的基于液压传动的流量自适应导叶调节装置还包括泵和活动导叶调节机构；所述泵包括叶轮，泵体，轴；所述文丘里管安装在泵的出口，所述液压缸相对于泵位置固定，所述活动导叶调节机构安装在泵上；所述凸轮机构从动件与活动导叶调节机构连接，从动件的运动可通过活动导叶调节机构传递到活动导叶，实现对活动导叶开度的调节。Further, the hydraulic drive-based flow adaptive guide vane adjustment device of the present invention further includes a pump and a movable guide vane adjustment mechanism; the pump includes an impeller, a pump body, and a shaft; the venturi tube is installed at the outlet of the pump , the position of the hydraulic cylinder is fixed relative to the pump, and the movable guide vane adjustment mechanism is installed on the pump; the cam mechanism follower is connected with the movable guide vane adjustment mechanism, and the movement of the follower can pass through the movable guide vane adjustment mechanism It is transmitted to the movable guide vane to realize the adjustment of the opening of the movable guide vane.
所述活动导叶安装在泵的叶轮进口之前，和/或安装在泵的叶轮出口之后。The movable guide vanes are installed before the impeller inlet of the pump and/or after the impeller outlet of the pump.
进一步的，所述进口段接口的取压口设置在进口段的壁面，所述取压口垂直于流动方向，以获得进口段的静压。Further, the pressure taking port of the inlet section interface is arranged on the wall surface of the inlet section, and the pressure taking port is perpendicular to the flow direction, so as to obtain the static pressure of the inlet section.
进一步的，所述进口段接口的取压口通过弯管伸入进口段中心，所述取压口正对来流方向，以获得所述进口段的总压。Further, the pressure taking port of the interface of the inlet section extends into the center of the inlet section through the elbow, and the pressure taking port is facing the direction of the incoming flow, so as to obtain the total pressure of the inlet section.
进一步的，所述根据流量自动调节泵活动导叶的装置是一套或多套。Further, the device for automatically adjusting the movable guide vanes of the pump according to the flow rate is one or more sets.
进一步的，所述泵为离心泵、混流泵或轴流泵。Further, the pump is a centrifugal pump, a mixed flow pump or an axial flow pump.
本发明的工作原理：The working principle of the present invention:
流量变化时，文丘里管进口段和喉部压差发生变化，通过液压管将该压力分别传递至液压缸活塞两侧，使活塞所受液压力变化，通过弹簧来平衡活塞液压力，导致活塞位置发生变化。再通过活塞杆、凸轮机构与导叶调节机构使导叶转动，实现对导叶开度的自动调节，使导叶开度调节具有流量自适应特性。When the flow rate changes, the pressure difference between the inlet section of the venturi tube and the throat changes, and the pressure is transmitted to both sides of the hydraulic cylinder piston through the hydraulic pipe, so that the hydraulic pressure on the piston changes, and the hydraulic pressure of the piston is balanced by the spring, causing the piston The location changes. Then, the guide vane is rotated through the piston rod, the cam mechanism and the guide vane adjusting mechanism, so as to realize the automatic adjustment of the guide vane opening, so that the guide vane opening adjustment has the characteristic of flow self-adaptation.
本发明的有益效果是：The beneficial effects of the present invention are:
(1)本发明可以根据泵的流量，自动调节导叶的开度。当导叶位于叶轮进口之前时，通过调节导叶的角度可以改变来流预旋，减小不同工况叶轮进口冲击损失；当导叶位于叶轮出口之后，通过调节导叶的角度可以减小不同工况导叶进口冲角，降低水力损失。提高泵非设计工况的运行效率，拓宽泵的高效运行范围；(1) The present invention can automatically adjust the opening of the guide vane according to the flow rate of the pump. When the guide vane is located in front of the impeller inlet, the flow pre-swirl can be changed by adjusting the angle of the guide vane to reduce the impeller inlet impact loss under different working conditions; when the guide vane is located after the impeller outlet, the difference can be reduced by adjusting the angle of the guide vane. The angle of attack at the inlet of the guide vane under working conditions reduces the hydraulic loss. Improve the operating efficiency of the pump under non-design conditions and widen the efficient operating range of the pump;
(2)不需要传感器和控制器等模块，结构简单，可靠性高；(2) Modules such as sensors and controllers are not required, with simple structure and high reliability;
(3)利用泵出口的液体压力能作为导叶调节机构的能量，无需额外的动力源，简单高效；(3) The liquid pressure energy at the pump outlet is used as the energy of the guide vane adjustment mechanism, which is simple and efficient without additional power source;
(4)采用液压传动，可将液体压力放大，以获得足够的动力；(4) Hydraulic transmission is adopted, which can amplify the liquid pressure to obtain sufficient power;
(5)采用凸轮机构时，只要适当设计凸轮轮廓，就能使导叶开度调节满足预期的调节规律；(5) When the cam mechanism is used, as long as the cam profile is properly designed, the guide vane opening can be adjusted to meet the expected adjustment law;
(6)应用广泛，可用于离心泵、混流泵、轴流泵活动导叶的自动调节。(6) Widely used, it can be used for automatic adjustment of movable guide vanes of centrifugal pumps, mixed flow pumps and axial flow pumps.
附图说明Description of drawings
图1是本发明基于液压传动的流量自适应导叶调节装置实施例1的立体图；FIG. 1 is a perspective view of Embodiment 1 of the flow adaptive guide vane adjusting device based on hydraulic transmission of the present invention;
图2是本发明基于液压传动的流量自适应导叶调节装置实施例1的俯视图；2 is a plan view of Embodiment 1 of the flow adaptive guide vane adjustment device based on hydraulic transmission of the present invention;
图3是本发明基于液压传动的流量自适应导叶调节装置实施例1的A-A剖视图；Fig. 3 is the A-A sectional view of Embodiment 1 of the flow adaptive guide vane adjustment device based on hydraulic transmission of the present invention;
图4是本发明基于液压传动的流量自适应导叶调节装置实施例1的B-B剖视图；4 is a B-B cross-sectional view of Embodiment 1 of the flow adaptive guide vane adjustment device based on hydraulic transmission of the present invention;
图5是进口段接口的取压口正对来流方向的示意图；Fig. 5 is the schematic diagram that the pressure taking port of the inlet section interface is facing the incoming flow direction;
图6是进口段接口的取压口垂直来流方向的示意图；Fig. 6 is the schematic diagram of the vertical flow direction of the pressure taking port of the inlet section interface;
图7是形封闭型移动凸轮机构结构示意图；7 is a schematic structural diagram of a closed-type moving cam mechanism;
图8是液压缸结构示意图；Figure 8 is a schematic structural diagram of a hydraulic cylinder;
图9是本发明基于液压传动的流量自适应导叶调节装置实施例2的示意图；Fig. 9 is the schematic diagram of Embodiment 2 of the flow adaptive guide vane adjusting device based on hydraulic transmission of the present invention;
图10是本发明基于液压传动的流量自适应导叶调节装置实施例2的局部放大图；Fig. 10 is a partial enlarged view of Embodiment 2 of the flow adaptive guide vane adjustment device based on hydraulic transmission of the present invention;
图11是本发明基于液压传动的流量自适应导叶调节装置实施例3的示意图。FIG. 11 is a schematic diagram of Embodiment 3 of the flow adaptive guide vane adjustment device based on hydraulic transmission of the present invention.
图中：1-文丘里管；11-进口段；12-收缩段；13-喉部；14-扩散段；15-进口段接口；16-喉部接口；17-进口段三通；18-喉部三通；2-液压缸；21-活塞杆；23-活塞；24-缸体；25-液压缸第一接口；26-液压缸第二接口；27-液压缸第一腔体；28-液压缸第二腔体；29-弹簧；3-凸轮；31-凸轮凹槽；32-滚子；33-从动件；34-机架；35-推拉杆；4-液压管；5-泵体；6-导叶室；61-导叶轴；62-从动锥齿轮；63-齿条；64-齿轮；65-锥齿轮盘；66-前置导叶；67-齿轮轴；68-主动锥齿轮；7-叶轮；8-轴；9-泵盖；101-控制环；102-连接臂；103-导叶套筒；104-导叶轴；105-导叶。In the figure: 1-Venturi; 11-Inlet section; 12-Contraction section; 13-Throat; 14-Diffusion section; 15-Inlet section interface; Throat tee; 2-hydraulic cylinder; 21-piston rod; 23-piston; 24-cylinder; 25-hydraulic cylinder first port; 26-hydraulic cylinder second port; 27-hydraulic cylinder first cavity; 28 -The second cavity of hydraulic cylinder; 29-spring; 3-cam; 31-cam groove; 32-roller; 33-follower; 34-frame; 35-push-pull rod; 4-hydraulic pipe; 5- Pump body; 6-guide vane chamber; 61-guide vane shaft; 62-driven bevel gear; 63-rack; 64-gear; 65-bevel gear plate; 66-front guide vane; 67-gear shaft; 68 - drive bevel gear; 7- impeller; 8- shaft; 9- pump cover; 101- control ring; 102- connecting arm; 103- guide vane sleeve; 104- guide vane shaft; 105- guide vane.
具体实施方式Detailed ways
以下结合说明书附图以及实施例对本发明进行进一步说明。The present invention will be further described below with reference to the accompanying drawings and embodiments.
实施例1：Example 1:
如图1、2所示，本发明基于液压传动的流量自适应导叶调节装置为一套。包括：文丘里管1，液压缸2，液压管4；所述文丘里管1包括：进口段11，收缩段12，喉部13，扩散段14；所述进口段11和所述喉部13分别设置有进口段接口15和喉部接口16；As shown in Figures 1 and 2, the flow adaptive guide vane adjustment device based on hydraulic transmission of the present invention is a set. It includes: Venturi tube 1, hydraulic cylinder 2, hydraulic tube 4; the Venturi tube 1 includes: an inlet section 11, a constriction section 12, a throat section 13, a diffuser section 14; the inlet section 11 and the throat section 13 The inlet section interface 15 and the throat interface 16 are respectively provided;
如图8所示，所述液压缸2包括：缸体24，活塞23，活塞杆21，弹簧29；所述活塞杆 21与所述活塞23装配为一体；所述活塞23安装在所述缸体24内，将缸体24内的空间分为液压缸第一腔体27和液压缸第二腔体28；所述活塞杆21的两端穿过所述缸体24两端，伸出到所述缸体24外部，所述活塞23及活塞杆21可沿所述缸体24轴线做直线往复运动；所述缸体24两侧还设置有液压缸第一接口25和液压缸第二接口26，所述液压缸第一接口25和液压缸第二接口26内部分别与液压缸第一腔体27和液压缸第二腔体28连通，所述液压缸第一接口25和液压缸第二接口26外部通过所述液压管4分别与所述进口段接口15和喉部接口16连通；所述弹簧29安装在所述活塞杆21上；流量变化会引所述进口段接口15和喉部接口16之间的压差发生变化，通过液压管4传递到所述活塞23两侧，引起所述活塞23及活塞杆21沿所述缸体24轴线运动，改变所述弹簧29的伸缩量，使所述活塞23及活塞杆21达到新的平衡位置。As shown in FIG. 8 , the hydraulic cylinder 2 includes: a cylinder block 24, a piston 23, a piston rod 21, and a spring 29; the piston rod 21 and the piston 23 are assembled into one body; the piston 23 is installed in the cylinder In the body 24, the space in the cylinder body 24 is divided into the first cavity 27 of the hydraulic cylinder and the second cavity 28 of the hydraulic cylinder; the two ends of the piston rod 21 pass through the two ends of the cylinder 24 and extend to Outside the cylinder body 24, the piston 23 and the piston rod 21 can reciprocate linearly along the axis of the cylinder body 24; the cylinder body 24 is also provided with a first hydraulic cylinder interface 25 and a hydraulic cylinder second interface on both sides 26. The first interface 25 of the hydraulic cylinder and the second interface 26 of the hydraulic cylinder are communicated with the first cavity 27 of the hydraulic cylinder and the second cavity 28 of the hydraulic cylinder respectively, and the first interface 25 of the hydraulic cylinder and the second hydraulic cylinder are respectively connected. The outside of the interface 26 is communicated with the inlet section interface 15 and the throat interface 16 through the hydraulic pipe 4 respectively; the spring 29 is installed on the piston rod 21; flow changes will lead to the inlet section interface 15 and the throat section. The pressure difference between the ports 16 changes and is transmitted to both sides of the piston 23 through the hydraulic pipe 4, causing the piston 23 and the piston rod 21 to move along the axis of the cylinder 24, changing the expansion and contraction of the spring 29, The piston 23 and the piston rod 21 are brought to a new equilibrium position.
如图7所示，本发明还包括凸轮机构，所述凸轮机构包括凸轮3，从动件33，机架34；所述凸轮3与所述活塞杆21连接；所述凸轮3为形封闭型移动凸轮，上面设置有凹槽31；所述从动件33安置在所述机架34内，所述机架34限制所述从动件33的运动，使所述从动件33只能沿一个方向做直线往复运动，所述从动件33端部安装有滚子32，所述滚子32安置在所述凸轮凹槽31内；所述活塞杆21运动会带动所述凸轮3运动，并引起所述从动件33沿所述机架34限制的方向做直线往复运动。As shown in FIG. 7 , the present invention also includes a cam mechanism, which includes a cam 3, a follower 33, and a frame 34; the cam 3 is connected with the piston rod 21; the cam 3 is of a closed type The moving cam is provided with a groove 31; the follower 33 is arranged in the frame 34, and the frame 34 restricts the movement of the follower 33, so that the follower 33 can only move along the A linear reciprocating motion is performed in one direction, and a roller 32 is installed at the end of the follower 33, and the roller 32 is arranged in the cam groove 31; the movement of the piston rod 21 will drive the cam 3 to move, and The follower 33 is caused to perform linear reciprocating motion along the direction restricted by the frame 34 .
本发明还包括泵和活动导叶调节机构；所述泵为离心泵，包括叶轮7，泵体5，轴8，泵盖9；所述文丘里管1安装在所述泵的出口，所述液压缸2相对于所述泵位置固定；所述活动导叶调节机构安装在所述叶轮7进口之前，主要由齿条63、齿轮64、齿轮轴67、主动锥齿轮68、锥齿轮盘65、从动锥齿轮62、导叶轴61、前置导叶66及导叶室6组成，前置导叶66数量为6片；凸轮机构从动件33与齿条63连接，齿条63与齿轮64啮合通过齿轮轴67带动主动锥齿轮68及前置导叶66转动，主动锥齿轮68与锥齿轮盘65啮合，带动锥齿轮盘65转动，锥齿轮盘65与从动锥齿轮62啮合，带动从动锥齿轮62转动，并通过导叶轴61带动其余前置导叶66同步转动，实现对所述前置导叶66开度的调节。The present invention also includes a pump and a movable guide vane adjusting mechanism; the pump is a centrifugal pump, including an impeller 7, a pump body 5, a shaft 8, and a pump cover 9; the venturi tube 1 is installed at the outlet of the pump, and the The position of the hydraulic cylinder 2 is fixed relative to the pump; the movable guide vane adjustment mechanism is installed before the inlet of the impeller 7, and is mainly composed of a rack 63, a gear 64, a gear shaft 67, a driving bevel gear 68, a bevel gear plate 65, The driven bevel gear 62, the guide vane shaft 61, the front guide vanes 66 and the guide vane chamber 6 are composed of six front guide vanes 66; the cam mechanism follower 33 is connected to the rack 63, and the rack 63 is connected to the gear 64 meshing drives the driving bevel gear 68 and the front guide vane 66 to rotate through the gear shaft 67, the driving bevel gear 68 meshes with the bevel gear disc 65, drives the bevel gear disc 65 to rotate, the bevel gear disc 65 meshes with the driven bevel gear 62, drives The driven bevel gear 62 rotates, and drives the remaining front guide vanes 66 to rotate synchronously through the guide vane shaft 61 , so as to adjust the opening of the front guide vanes 66 .
如图5所示，所述进口段接口15的取压口通过弯管伸入所述进口段11中心，正对来流方向，以获得所述进口段11的总压。As shown in FIG. 5 , the pressure taking port of the inlet section interface 15 extends into the center of the inlet section 11 through an elbow, facing the inflow direction, so as to obtain the total pressure of the inlet section 11 .
实施例2：Example 2:
如图9所示，本发明基于液压传动的流量自适应导叶调节装置为两套同时使用。包括：文丘里管1，液压缸2，液压管4；所述文丘里管1包括：进口段11，收缩段12，喉部13，扩散段14；所述进口段11和所述喉部13分别设置有进口段接口15和喉部接口16；在所述进口段接口15和喉部接口16外部分别安装进口段三通17和喉部三通18；如图8所示，所 述液压缸2包括：缸体24，活塞23，活塞杆21，弹簧29；所述活塞杆21与所述活塞23装配为一体；所述活塞23安装在所述缸体24内，将缸体24内的空间分为液压缸第一腔体27和液压缸第二腔体28；所述活塞杆21的两端穿过所述缸体24两端，伸出到所述缸体24外部，所述活塞23及活塞杆21可沿所述缸体24轴线做直线往复运动；所述缸体24两侧还设置有液压缸第一接口25和液压缸第二接口26，As shown in FIG. 9 , two sets of the flow adaptive guide vane adjustment device based on hydraulic transmission of the present invention are used at the same time. It includes: Venturi tube 1, hydraulic cylinder 2, hydraulic tube 4; the Venturi tube 1 includes: an inlet section 11, a constriction section 12, a throat section 13, a diffuser section 14; the inlet section 11 and the throat section 13 The inlet section interface 15 and the throat interface 16 are respectively provided; the inlet section tee 17 and the throat tee 18 are respectively installed outside the inlet section interface 15 and the throat interface 16; as shown in FIG. 8, the hydraulic cylinder 2 includes: a cylinder 24, a piston 23, a piston rod 21, and a spring 29; the piston rod 21 is assembled with the piston 23; the piston 23 is installed in the cylinder 24, and the The space is divided into the first cavity 27 of the hydraulic cylinder and the second cavity 28 of the hydraulic cylinder; the two ends of the piston rod 21 pass through the two ends of the cylinder 24 and extend to the outside of the cylinder 24, and the piston 23 and the piston rod 21 can do linear reciprocating motion along the axis of the cylinder body 24; both sides of the cylinder body 24 are also provided with a hydraulic cylinder first interface 25 and a hydraulic cylinder second interface 26,
所述液压缸第一接口25和液压缸第二接口26内部分别与液压缸第一腔体27和液压缸第二腔体28连通，所述液压缸第一接口25和液压缸第二接口26外部通过所述液压管4分别与所述进口段三通17和喉部三通18连通；所述弹簧29安装在所述活塞杆21上；流量变化会引起所述进口段三通17和喉部三通18之间的压差发生变化，通过液压管4传递到所述活塞23两侧，引起所述活塞23及活塞杆21沿所述缸体24轴线运动，改变所述弹簧29的伸缩量，使所述活塞23及活塞杆21达到新的平衡位置。The first interface 25 of the hydraulic cylinder and the second interface 26 of the hydraulic cylinder are communicated with the first cavity 27 of the hydraulic cylinder and the second cavity 28 of the hydraulic cylinder respectively. The first interface 25 of the hydraulic cylinder and the second interface 26 of the hydraulic cylinder The outside is communicated with the inlet tee 17 and the throat tee 18 through the hydraulic pipe 4 respectively; the spring 29 is installed on the piston rod 21; flow changes will cause the inlet tee 17 and the throat The pressure difference between the tee 18 changes, and is transmitted to both sides of the piston 23 through the hydraulic pipe 4, causing the piston 23 and the piston rod 21 to move along the axis of the cylinder 24, changing the expansion and contraction of the spring 29 amount, so that the piston 23 and the piston rod 21 reach a new equilibrium position.
如图7所示，本发明还包括凸轮机构，所述凸轮机构包括凸轮3，从动件33，机架34；所述凸轮3与所述活塞杆21连接；所述凸轮3为形封闭型移动凸轮，上面设置有凹槽31；所述从动件33安置在所述机架34内，所述机架34限制所述从动件33的运动，使所述从动件33只能沿一个方向做直线往复运动，所述从动件33端部安装有滚子32，所述滚子32安置在所述凸轮凹槽31内；所述活塞杆21运动会带动所述凸轮3运动，并引起所述从动件33沿所述机架34限制的方向做往复运动。As shown in FIG. 7 , the present invention also includes a cam mechanism, which includes a cam 3, a follower 33, and a frame 34; the cam 3 is connected with the piston rod 21; the cam 3 is of a closed type The moving cam is provided with a groove 31; the follower 33 is arranged in the frame 34, and the frame 34 restricts the movement of the follower 33, so that the follower 33 can only move along the A linear reciprocating motion is performed in one direction, and a roller 32 is installed at the end of the follower 33, and the roller 32 is arranged in the cam groove 31; the movement of the piston rod 21 will drive the cam 3 to move, and The follower 33 is caused to reciprocate in the direction restricted by the frame 34 .
本发明还包括泵和活动导叶调节机构；所述泵为离心泵，包括叶轮7，泵体5，轴8，泵盖9；所述文丘里管1安装在所述泵的出口，所述液压缸2相对于所述泵位置固定；所述活动导叶调节机构安装在所述叶轮7出口之后，主要由推拉杆35、控制环101、连接臂102、导叶套筒103、导叶轴104及导叶105组成，导叶数量为15片；推拉杆35一端与凸轮机构从动件33铰接，另一端与控制环101铰接；连接臂102一端与控制环101铰接，另一端与导叶套筒103铰接；导叶套筒103与导叶轴104、导叶105固定连接，可绕导叶轴104转动；当凸轮机构从动件33运动时，会带动推拉杆35运动，引起控制环101转动，通过连接臂102带动导叶套筒103及导叶轴104转动，从而使所有导叶105绕导叶轴104同步转动，实现对所述导叶105开度的调节。The present invention also includes a pump and a movable guide vane adjusting mechanism; the pump is a centrifugal pump, including an impeller 7, a pump body 5, a shaft 8, and a pump cover 9; the venturi tube 1 is installed at the outlet of the pump, and the The position of the hydraulic cylinder 2 is fixed relative to the pump; the movable guide vane adjustment mechanism is installed after the outlet of the impeller 7, and mainly consists of a push-pull rod 35, a control ring 101, a connecting arm 102, a guide vane sleeve 103, and a guide vane shaft 104 and guide vanes 105, the number of guide vanes is 15; one end of the push-pull rod 35 is hinged with the cam mechanism follower 33, and the other end is hinged with the control ring 101; one end of the connecting arm 102 is hinged with the control ring 101, and the other end is hinged with the guide vane The sleeve 103 is hinged; the guide vane sleeve 103 is fixedly connected with the guide vane shaft 104 and the guide vane 105, and can rotate around the guide vane shaft 104; when the cam mechanism follower 33 moves, it will drive the push-pull rod 35 to move, causing the control ring 101 rotates, and the guide vane sleeve 103 and the guide vane shaft 104 are driven to rotate by the connecting arm 102, so that all guide vanes 105 rotate synchronously around the guide vane shaft 104, and the opening degree of the guide vanes 105 is adjusted.
如图5所示，所述进口段接口15的取压口通过弯管伸入所述进口段11中心，正对来流方向，以获得所述进口段11的总压。As shown in FIG. 5 , the pressure taking port of the inlet section interface 15 extends into the center of the inlet section 11 through an elbow, facing the inflow direction, so as to obtain the total pressure of the inlet section 11 .
实施例3：Example 3:
如图11所示，本发明基于液压传动的流量自适应导叶调节装置为一套。包括：文丘里管1，液压缸2，液压管4；所述文丘里管1包括：进口段11，收缩段12，喉部13，扩散段14； 所述进口段11和所述喉部13分别设置有进口段接口15和喉部接口16；如图8所示，所述液压缸2包括：缸体24，活塞23，活塞杆21，弹簧29；所述活塞杆21与所述活塞23装配为一体；所述活塞23安装在所述缸体24内，将缸体24内的空间分为液压缸第一腔体27和液压缸第二腔体28；所述活塞杆21的两端穿过所述缸体24两端，伸出到所述缸体24外部，所述活塞23及活塞杆21可沿所述缸体24轴线做直线往复运动；所述缸体24两侧还设置有液压缸第一接口25和液压缸第二接口26，所述液压缸第一接口25和液压缸第二接口26内部分别与所述液压缸第一腔体27和液压缸第二腔体28连通，所述液压缸第一接口25和液压缸第二接口26外部通过所述液压管4分别与所述进口段接口15和喉部接口16连通；所述弹簧29安装在所述活塞杆21上；流量变化会引起所述进口段接口15和喉部接口16之间的压差发生变化，所述压差通过液压管4传递到所述活塞23两侧，引起所述活塞23及活塞杆21沿所述缸体24轴线运动，改变所述弹簧29的伸缩量，使所述活塞23及活塞杆21达到新的平衡位置。As shown in FIG. 11 , the flow adaptive guide vane adjustment device based on hydraulic transmission of the present invention is a set. It includes: Venturi tube 1, hydraulic cylinder 2, hydraulic tube 4; the Venturi tube 1 includes: an inlet section 11, a constriction section 12, a throat section 13, and a diffuser section 14; the inlet section 11 and the throat section 13 The inlet section interface 15 and the throat interface 16 are respectively provided; as shown in FIG. 8 , the hydraulic cylinder 2 includes: a cylinder body 24, a piston 23, a piston rod 21, and a spring 29; the piston rod 21 and the piston 23 Assembled as a whole; the piston 23 is installed in the cylinder 24, and the space in the cylinder 24 is divided into the first cavity 27 of the hydraulic cylinder and the second cavity 28 of the hydraulic cylinder; the two ends of the piston rod 21 Passing through both ends of the cylinder 24 and extending to the outside of the cylinder 24, the piston 23 and the piston rod 21 can reciprocate linearly along the axis of the cylinder 24; There are a first interface 25 of a hydraulic cylinder and a second interface 26 of the hydraulic cylinder. The first interface 25 of the hydraulic cylinder and the second interface 26 of the hydraulic cylinder are respectively connected with the first cavity 27 of the hydraulic cylinder and the second cavity 28 of the hydraulic cylinder. The first interface 25 of the hydraulic cylinder and the second interface 26 of the hydraulic cylinder communicate with the inlet section interface 15 and the throat interface 16 through the hydraulic pipe 4 respectively; the spring 29 is installed on the piston rod 21 The flow change will cause the pressure difference between the inlet section interface 15 and the throat interface 16 to change, and the pressure difference is transmitted to both sides of the piston 23 through the hydraulic pipe 4, causing the piston 23 and the piston rod to change. 21 moves along the axis of the cylinder 24 to change the expansion and contraction amount of the spring 29, so that the piston 23 and the piston rod 21 reach a new equilibrium position.
本发明还包括泵和活动导叶调节机构；所述泵为离心泵，包括叶轮7，泵体5，轴8，泵盖9；所述文丘里管1安装在所述泵的出口，所述液压缸2相对于所述泵位置固定；所述活动导叶调节机构安装在所述叶轮7进口之前，主要由齿条63、齿轮64、齿轮轴67、主动锥齿轮68、锥齿轮盘65、从动锥齿轮62、导叶轴61、前置导叶66及导叶室6组成，前置导叶66数量为6片；活塞杆21与齿条63连接，齿条63与齿轮64啮合通过齿轮轴67带动主动锥齿轮68及前置导叶66转动，主动锥齿轮68与锥齿轮盘65啮合，带动锥齿轮盘65转动，锥齿轮盘65与从动锥齿轮62啮合，带动从动锥齿轮62转动，并通过导叶轴61带动其余前置导叶66同步转动，实现对所述前置导叶66开度的调节。The present invention also includes a pump and a movable guide vane adjusting mechanism; the pump is a centrifugal pump, including an impeller 7, a pump body 5, a shaft 8, and a pump cover 9; the venturi tube 1 is installed at the outlet of the pump, and the The position of the hydraulic cylinder 2 is fixed relative to the pump; the movable guide vane adjustment mechanism is installed before the inlet of the impeller 7, and is mainly composed of a rack 63, a gear 64, a gear shaft 67, a driving bevel gear 68, a bevel gear plate 65, The driven bevel gear 62, the guide vane shaft 61, the front guide vanes 66 and the guide vane chamber 6 are composed of 6 pieces of the front guide vanes 66; the piston rod 21 is connected with the rack 63, and the rack 63 and the gear 64 mesh through The gear shaft 67 drives the driving bevel gear 68 and the front guide vane 66 to rotate, the driving bevel gear 68 meshes with the bevel gear disc 65, drives the bevel gear disc 65 to rotate, the bevel gear disc 65 meshes with the driven bevel gear 62, drives the driven bevel The gear 62 rotates, and drives the remaining front guide vanes 66 to rotate synchronously through the guide vane shaft 61 , so as to realize the adjustment of the opening of the front guide vanes 66 .
如图6所示，所述进口段接口15的取压口设置在所述进口段11的壁面，垂直于来流方向，以获得所述进口段11的静压。As shown in FIG. 6 , the pressure taking port of the inlet section interface 15 is arranged on the wall surface of the inlet section 11 , which is perpendicular to the incoming flow direction, so as to obtain the static pressure of the inlet section 11 .
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (8)

  1. 一种基于液压传动的流量自适应导叶调节装置，包括：文丘里管(1)，液压缸(2)，液压管(4)，其特征在于：A flow adaptive guide vane adjustment device based on hydraulic transmission, comprising: a venturi tube (1), a hydraulic cylinder (2), and a hydraulic tube (4), characterized in that:
    所述文丘里管(1)包括：进口段(11)，收缩段(12)，喉部(13)，扩散段(14)；所述进口段(11)和喉部(13)分别设置有进口段接口(15)和喉部接口(16)；The venturi tube (1) includes: an inlet section (11), a constriction section (12), a throat (13), and a diffusion section (14); the inlet section (11) and the throat (13) are respectively provided with inlet section interface (15) and throat interface (16);
    所述液压缸(2)包括：缸体(24)，活塞(23)，活塞杆(21)，弹簧(29)；所述活塞杆(21)与活塞(23)装配为一体；所述活塞(23)安装在缸体(24)内，所述活塞杆(21)的两端穿过缸体(24)两端，伸出到缸体(24)外部，所述活塞(23)及活塞杆(21)可沿缸体(24)轴线做直线往复运动；所述缸体(24)两侧还设置有液压缸第一接口(25)和液压缸第二接口(26)，所述液压缸第一接口(25)和液压缸第二接口(26)内部分别与液压缸第一腔体(27)和液压缸第二腔体(28)连通，所述液压缸第一接口(25)和液压缸第二接口(26)外部通过所述液压管(4)分别与所述进口段接口(15)和喉部接口(16)连通；所述弹簧(29)安装在活塞杆(21)上；流量变化会引起进口段接口(15)和喉部接口(16)之间的压差发生变化，所述压差传递到活塞(23)两侧，引起所述活塞(23)及活塞杆(21)沿所述缸体(24)轴线运动，改变弹簧(29)的伸缩量，使所述活塞(23)及活塞杆(21)到达新的平衡位置。The hydraulic cylinder (2) comprises: a cylinder body (24), a piston (23), a piston rod (21), and a spring (29); the piston rod (21) and the piston (23) are assembled into one body; the piston (23) is installed in the cylinder (24), the two ends of the piston rod (21) pass through the two ends of the cylinder (24) and protrude to the outside of the cylinder (24), the piston (23) and the piston The rod (21) can perform linear reciprocating motion along the axis of the cylinder body (24); both sides of the cylinder body (24) are further provided with a first hydraulic cylinder interface (25) and a second hydraulic cylinder interface (26), the hydraulic The cylinder first interface (25) and the hydraulic cylinder second interface (26) communicate with the hydraulic cylinder first cavity (27) and the hydraulic cylinder second cavity (28) respectively, and the hydraulic cylinder first interface (25) The outside of the second interface (26) of the hydraulic cylinder is communicated with the inlet section interface (15) and the throat interface (16) respectively through the hydraulic pipe (4); the spring (29) is installed on the piston rod (21) The flow change will cause the pressure difference between the inlet section interface (15) and the throat interface (16) to change, and the pressure difference will be transmitted to both sides of the piston (23), causing the piston (23) and the piston rod to change. (21) Move along the axis of the cylinder (24) to change the expansion and contraction amount of the spring (29), so that the piston (23) and the piston rod (21) reach a new equilibrium position.
  2. 根据权利要求1所述的基于液压传动的流量自适应导叶调节装置，其特征在于：还包括泵和活动导叶调节机构；所述泵包括叶轮(7)，泵体(5)，轴(8)；所述文丘里管(1)安装在泵的出口，所述液压缸(2)相对于泵位置固定，所述活动导叶调节机构安装在泵上；所述活塞杆(21)与活动导叶调节机构连接，所述活塞杆(21)的运动可通过所述活动导叶调节机构传递到活动导叶，实现对活动导叶开度的调节。The flow adaptive guide vane adjustment device based on hydraulic transmission according to claim 1, characterized in that: it further comprises a pump and a movable guide vane adjustment mechanism; the pump comprises an impeller (7), a pump body (5), a shaft ( 8); the venturi tube (1) is installed at the outlet of the pump, the hydraulic cylinder (2) is fixed in position relative to the pump, and the movable guide vane adjustment mechanism is installed on the pump; the piston rod (21) is connected to the pump; The movable guide vane adjustment mechanism is connected, and the movement of the piston rod (21) can be transmitted to the movable guide vane through the movable guide vane adjustment mechanism, so as to realize the adjustment of the opening degree of the movable guide vane.
  3. 根据权利要求1所述的基于液压传动的流量自适应导叶调节装置，其特征在于：还包括凸轮机构，所述凸轮机构包括凸轮(3)，从动件(33)，机架(34)；所述凸轮(3)与活塞杆(21)连接；所述凸轮(3)为形封闭型移动凸轮，上面设置有凹槽(31)；所述从动件(33)安置在机架(34)内，所述机架(34)限制从动件(33)的运动，使从动件(33)只能沿一个方向做直线往复运动，所述从动件(33)端部安装有滚子(32)，滚子(32)安置在所述凸轮凹槽(31)内；所述活塞杆(21)的运动会带动凸轮(3)运动，并引起从动件(33)沿机架(34)限制的方向做直线往复运动。The device for adjusting the flow adaptive guide vane based on hydraulic transmission according to claim 1, characterized in that it further comprises a cam mechanism, and the cam mechanism comprises a cam (3), a follower (33), a frame (34) ; The cam (3) is connected with the piston rod (21); the cam (3) is a closed-type moving cam, and is provided with a groove (31); the follower (33) is arranged on the frame ( 34), the frame (34) restricts the movement of the follower (33), so that the follower (33) can only reciprocate linearly in one direction, and the end of the follower (33) is installed with a Roller (32), the roller (32) is arranged in the cam groove (31); the movement of the piston rod (21) will drive the cam (3) to move, and cause the follower (33) to move along the frame (34) Do linear reciprocating motion in the direction of limitation.
  4. 根据权利要求3所述的基于液压传动的流量自适应导叶调节装置，其特征在于：还包括泵和活动导叶调节机构；所述泵包括叶轮(7)，泵体(5)，轴(8)；所述文丘里管(1)安装在泵的出口，所述液压缸(2)相对于泵位置固定，所述活动导叶调节机构安装在泵上；所述凸轮机构从动件(33)与活动导叶调节机构连接，从动件(33)的运动可通过活动导叶调 节机构传递到活动导叶，实现对活动导叶开度的调节。The flow adaptive guide vane adjusting device based on hydraulic transmission according to claim 3, characterized in that: it further comprises a pump and a movable guide vane adjusting mechanism; the pump comprises an impeller (7), a pump body (5), a shaft ( 8); the venturi tube (1) is installed at the outlet of the pump, the hydraulic cylinder (2) is fixed in position relative to the pump, and the movable guide vane adjustment mechanism is installed on the pump; the cam mechanism follower ( 33) It is connected with the movable guide vane adjustment mechanism, and the movement of the follower (33) can be transmitted to the movable guide vane through the movable guide vane adjustment mechanism, so as to realize the adjustment of the opening degree of the movable guide vane.
  5. 根据权利要求2或4所述的基于液压传动的流量自适应导叶调节装置，其特征在于：所述活动导叶安装在泵的叶轮进口之前，和/或安装在泵的叶轮出口之后。The flow adaptive guide vane adjustment device based on hydraulic transmission according to claim 2 or 4, wherein the movable guide vane is installed before the impeller inlet of the pump, and/or installed after the impeller outlet of the pump.
  6. 根据权利要求1所述的基于液压传动的流量自适应导叶调节装置，其特征在于：所述进口段接口(15)的取压口设置在进口段(11)的壁面，所述取压口垂直于流动方向，以获得进口段(11)的静压。The flow adaptive guide vane adjustment device based on hydraulic transmission according to claim 1, characterized in that: the pressure taking port of the inlet section interface (15) is arranged on the wall surface of the inlet section (11), and the pressure taking port perpendicular to the flow direction to obtain the static pressure of the inlet section (11).
  7. 根据权利要求1所述的基于液压传动的流量自适应导叶调节装置，其特征在于：所述进口段接口(15)的取压口通过弯管伸入进口段(11)中心，所述取压口正对来流方向，以获得进口段(11)的总压。The flow adaptive guide vane adjustment device based on hydraulic transmission according to claim 1, characterized in that: the pressure taking port of the inlet section interface (15) extends into the center of the inlet section (11) through an elbow, and the pressure taking port (15) extends into the center of the inlet section (11) through an elbow. The pressure port is facing the incoming flow direction to obtain the total pressure of the inlet section (11).
  8. 根据权利要求1或3所述的基于液压传动的流量自适应导叶调节装置，其特征在于：所述基于液压传动的流量自适应导叶调节装置是一套或多套。The flow adaptive guide vane adjustment device based on hydraulic transmission according to claim 1 or 3, characterized in that: the hydraulic transmission based flow adaptive guide vane adjustment device is one or more sets.
PCT/CN2021/100277 2021-04-28 2021-06-16 Flow-adaptive guide vane adjustment device based on hydraulic transmission WO2022227244A1 (en)

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