CN104314892A - Bypass throttling governing loop for lifting machine - Google Patents
Bypass throttling governing loop for lifting machine Download PDFInfo
- Publication number
- CN104314892A CN104314892A CN201410475701.0A CN201410475701A CN104314892A CN 104314892 A CN104314892 A CN 104314892A CN 201410475701 A CN201410475701 A CN 201410475701A CN 104314892 A CN104314892 A CN 104314892A
- Authority
- CN
- China
- Prior art keywords
- valve
- lifting machine
- throttle
- governing loop
- hydraulic pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a bypass throttling governing loop for a lifting machine, and belongs to the field of hydraulic drive. The bypass throttling governing loop comprises an oil tank, a hydraulic pump, a stop valve, a pressure meter, an overflow valve, a reversing valve, a hydraulic cylinder and a throttle valve, wherein the inlet oil pipe of the hydraulic pump is connected with the oil tank, and the outlet oil pipe of the hydraulic pump is connected with the stop valve, the overflow valve, the reversing valve and the throttle valve respectively; the oil return pipes of the overflow valve, the reversing valve and the throttle valve are all connected with the oil tank; the hydraulic cylinder is connected onto the reversing valve. According to the bypass throttling governing loop, the problem of low speed stability caused by poor speed stiffness of a conventional lifting machine due to a governing loop is solved; the bypass throttling governing loop has the advantages of simple structure, reasonable design and simplicity for manufacture.
Description
Technical field
The invention belongs to hydraulic transmission field, more particularly, relate to a kind of lifting machine lifting flow control circuit.
Background technique
Along with the development of automobile industry, auto repair becomes an emerging industry gradually with maintenance.Wherein lifting machine is as the important tool in auto repair and servicing operations, have also been obtained and develops faster.Automobile is mainly brought up to another safe altitude from a safe altitude by lifting machine, so that manual operation and maintenance.Current lifting machine has a lot of type, can be divided into mechanical transmission and hydraulic transmission according to the kind of drive.Mechanical transmission structure is simple, low price, but lifting weight is restricted, and leading screw or work nut slide fastener easily occur, and there is larger potential safety hazard.And hydraulic transmission lifting machine Safety performance good, operate steadily, easy to maintenance and working efficiency is high, be current lifting machine transmission use mainstream type.But the Hydraulic Power Transmission System of lifting machine, because flow control circuit Speed rigidity is poor, causes speed stability low at present, have impact on stability and the Security of its operation.
Summary of the invention
For existing lifting machine because flow control circuit Speed rigidity is poor, and the problem causing speed stability low, the invention provides a kind of lifting machine by-pass throttle flow control circuit, by arranging throttle valve in the bypass of selector valve, reaching the object improving Speed rigidity.
For solving the problem, the present invention adopts following technological scheme.
A kind of lifting machine by-pass throttle flow control circuit, comprise fuel tank, oil hydraulic pump, stop valve, pressure gauge, relief valve, selector valve, oil hydraulic cylinder, throttle valve, the import oil pipe of described oil hydraulic pump is connected with fuel tank, outlet oil pipe is connected with throttle valve with stop valve, relief valve, selector valve respectively, the other end of described stop valve is connected with pressure gauge, described relief valve, selector valve are all connected fuel tank with the return tube of throttle valve, and described oil hydraulic cylinder is connected on selector valve.
Described selector valve is three-position four-way electromagnetic directional valve.
Compared to prior art, beneficial effect of the present invention is:
(1) the present invention adopts by-pass throttle flow control circuit for the speed governing of lifting machine, throttle valve is placed on the branch road be in parallel with oil hydraulic cylinder, it is while regulator solution cylinder pressure flow, play the effect of overflowing excess traffic, its advantage is in throttle valve circulation area one timing, load is larger, and Speed rigidity is larger, meets the performance characteristic of lifting machine better.
(2) structure of the present invention is simple, reasonable in design, is easy to manufacture.
Accompanying drawing explanation
Fig. 1 is hydraulic scheme of the present invention.
In figure: 1-fuel tank, 2-oil hydraulic pump, 3-stop valve, 4-pressure gauge, 5-relief valve, 6-selector valve, 7-oil hydraulic cylinder, 8-throttle valve.
Embodiment
Describe the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, lifting machine by-pass throttle flow control circuit comprises fuel tank 1, oil hydraulic pump 2, stop valve 3, pressure gauge 4, relief valve 5, selector valve 6, oil hydraulic cylinder 7, throttle valve 8, the import oil pipe of described oil hydraulic pump 2 is connected with fuel tank 1, outlet oil pipe is connected with throttle valve 8 with stop valve 3, relief valve 5, selector valve 6 respectively, the other end of described stop valve 3 is connected with pressure gauge 4, described relief valve 5, selector valve 6 are all connected fuel tank 1 with the return tube of throttle valve 8, and described oil hydraulic cylinder 7 is connected on selector valve 6.
Described selector valve 6 is three-position four-way electromagnetic directional valve.
embodiment 1
As shown in Figure 1, lifting machine by-pass throttle flow control circuit comprises fuel tank 1, oil hydraulic pump 2, stop valve 3, pressure gauge 4, relief valve 5, selector valve 6, oil hydraulic cylinder 7, throttle valve 8, the import oil pipe of described oil hydraulic pump 2 is connected with fuel tank 1, outlet oil pipe is connected with throttle valve 8 with stop valve 3, relief valve 5, selector valve 6 respectively, the other end of described stop valve 3 is connected with pressure gauge 4, described relief valve 5, selector valve 6 are all connected fuel tank 1 with the return tube of throttle valve 8, and described oil hydraulic cylinder 7 is connected on selector valve 6.
Described selector valve 6 is three-position four-way electromagnetic directional valve, and described throttle valve 8 adopts sliding bush type throttle valve.
Claims (2)
1. a lifting machine by-pass throttle flow control circuit, comprise fuel tank (1), oil hydraulic pump (2), stop valve (3), pressure gauge (4), relief valve (5), selector valve (6), oil hydraulic cylinder (7), throttle valve (8), it is characterized in that, the import oil pipe of described oil hydraulic pump (2) is connected with fuel tank (1), outlet oil pipe respectively with stop valve (3), relief valve (5), selector valve (6) is connected with throttle valve (8), the other end of described stop valve (3) is connected with pressure gauge (4), described relief valve (5), selector valve (6) is all connected fuel tank (1) with the return tube of throttle valve (8), described oil hydraulic cylinder (7) is connected on selector valve (6).
2. lifting machine by-pass throttle flow control circuit according to claim 1, is characterized in that, described selector valve (6) is three-position four-way electromagnetic directional valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475701.0A CN104314892A (en) | 2014-09-18 | 2014-09-18 | Bypass throttling governing loop for lifting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475701.0A CN104314892A (en) | 2014-09-18 | 2014-09-18 | Bypass throttling governing loop for lifting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104314892A true CN104314892A (en) | 2015-01-28 |
Family
ID=52370175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410475701.0A Pending CN104314892A (en) | 2014-09-18 | 2014-09-18 | Bypass throttling governing loop for lifting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104314892A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009029555A (en) * | 2007-07-25 | 2009-02-12 | Kyb Engineering & Service Co Ltd | Lifter device |
| CN101982399A (en) * | 2010-09-01 | 2011-03-02 | 安徽天康(集团)股份有限公司 | Hydraulic lift independent iron tower rod differential superposition back-pressure hydraulic system |
| CN103672126A (en) * | 2013-12-26 | 2014-03-26 | 重庆川仪自动化股份有限公司 | Electro-hydraulic actuator |
-
2014
- 2014-09-18 CN CN201410475701.0A patent/CN104314892A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009029555A (en) * | 2007-07-25 | 2009-02-12 | Kyb Engineering & Service Co Ltd | Lifter device |
| CN101982399A (en) * | 2010-09-01 | 2011-03-02 | 安徽天康(集团)股份有限公司 | Hydraulic lift independent iron tower rod differential superposition back-pressure hydraulic system |
| CN103672126A (en) * | 2013-12-26 | 2014-03-26 | 重庆川仪自动化股份有限公司 | Electro-hydraulic actuator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150128 |