CN104405700A - Speed adjusting loop of lifter inlet throttle speed adjusting valve - Google Patents
Speed adjusting loop of lifter inlet throttle speed adjusting valve Download PDFInfo
- Publication number
- CN104405700A CN104405700A CN201410475734.5A CN201410475734A CN104405700A CN 104405700 A CN104405700 A CN 104405700A CN 201410475734 A CN201410475734 A CN 201410475734A CN 104405700 A CN104405700 A CN 104405700A
- Authority
- CN
- China
- Prior art keywords
- valve
- speed adjusting
- flow control
- loop
- series flow
- 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
-
- 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
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/044—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out"
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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
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 speed adjusting loop of a lifter inlet throttle speed adjusting valve, and belongs to the field of hydraulic transmission. The speed adjusting loop comprises an oil tank, a hydraulic pump, a stop valve, a pressure gauge, an overflow valve, a reversing valve, a hydraulic cylinder and a speed adjusting valve, wherein an inlet oil pipe of the hydraulic pump is connected with the oil tank, and an outlet oil pipe is respectively connected with the stop valve, the overflow valve and the speed adjusting valve; the other end of the speed adjusting valve is connected with an oil inlet P of the reversing valve; and the hydraulic cylinder is connected to the reversing valve. The speed adjusting loop solves the problems of weak load characteristic of a traditional lifter speed adjusting loop and variation of speed and rigidity of the loop along with the load change, and has the advantages of simple structure, reasonable design and easy production.
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 at present, because flow control circuit load characteristic is poor, loop speeds rigidity changes with load variations, have impact on the accuracy of its operation, stability and Security.
Summary of the invention
The problem that, loop speeds rigidity poor for existing lifting machine flow control circuit load characteristic changes with load variations, the invention provides a kind of lifting machine inlet throttle series flow control valve flow control circuit, by arranging series flow control valve in inlet, its speed is regulated, reach the object improving its load characteristic.
For solving the problem, the present invention adopts following technological scheme.
A kind of lifting machine inlet throttle series flow control valve flow control circuit, comprise fuel tank, oil hydraulic pump, stop valve, pressure gauge, relief valve, selector valve, oil hydraulic cylinder, series flow control valve, the import oil pipe of described oil hydraulic pump is connected with fuel tank, outlet oil pipe is connected with series flow control valve with stop valve, relief valve respectively, the other end of described stop valve is connected with pressure gauge, described relief valve is connected fuel tank with the return tube of selector valve, the other end of described series flow control valve is connected with the oil inlet P of selector 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 inlet throttle series flow control valve flow control circuit for the speed governing of lifting machine, by arranging series flow control valve in inlet, its speed is regulated, solve the problem of the load characteristic difference that conventional throttle valve brings, the Speed rigidity in loop no longer changes with the change of load, and load characteristic greatly improves.
(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-series flow control valve.
Embodiment
Describe the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, lifting machine inlet throttle series flow control valve 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, series flow control valve 8, the import oil pipe of described oil hydraulic pump 2 is connected with fuel tank 1, outlet oil pipe is connected with series flow control valve 8 with stop valve 3, relief valve 5 respectively, the other end of described stop valve 3 is connected with pressure gauge 4, described relief valve 5 is connected fuel tank 1 with the return tube of selector valve 6, the other end of described series flow control valve 8 is connected with the oil inlet P of selector valve 6, 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 inlet throttle series flow control valve 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, series flow control valve 8, the import oil pipe of described oil hydraulic pump 2 is connected with fuel tank 1, outlet oil pipe is connected with series flow control valve 8 with stop valve 3, relief valve 5 respectively, the other end of described stop valve 3 is connected with pressure gauge 4, described relief valve 5 is connected fuel tank 1 with the return tube of selector valve 6, the other end of described series flow control valve 8 is connected with the oil inlet P of selector valve 6, 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 relief valve 5 adopts direct-acting overflow valve.
Claims (2)
1. a lifting machine inlet throttle series flow control valve 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), series flow control 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) is connected with series flow control valve (8), the other end of described stop valve (3) is connected with pressure gauge (4), described relief valve (5) is connected fuel tank (1) with the return tube of selector valve (6), the other end of described series flow control valve (8) is connected with the oil inlet P of selector valve (6), described oil hydraulic cylinder (7) is connected on selector valve (6).
2. lifting machine inlet throttle series flow control valve 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 |
|---|---|---|---|
| CN201410475734.5A CN104405700A (en) | 2014-09-18 | 2014-09-18 | Speed adjusting loop of lifter inlet throttle speed adjusting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475734.5A CN104405700A (en) | 2014-09-18 | 2014-09-18 | Speed adjusting loop of lifter inlet throttle speed adjusting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104405700A true CN104405700A (en) | 2015-03-11 |
Family
ID=52643353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410475734.5A Pending CN104405700A (en) | 2014-09-18 | 2014-09-18 | Speed adjusting loop of lifter inlet throttle speed adjusting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104405700A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672126A (en) * | 2013-12-26 | 2014-03-26 | 重庆川仪自动化股份有限公司 | Electro-hydraulic actuator |
| CN103708381A (en) * | 2013-12-17 | 2014-04-09 | 天津大学 | Roller shifting system with self-guide function |
-
2014
- 2014-09-18 CN CN201410475734.5A patent/CN104405700A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708381A (en) * | 2013-12-17 | 2014-04-09 | 天津大学 | Roller shifting system with self-guide function |
| CN103672126A (en) * | 2013-12-26 | 2014-03-26 | 重庆川仪自动化股份有限公司 | Electro-hydraulic actuator |
Non-Patent Citations (1)
| Title |
|---|
| 张大欢: "节能型升降机液压***改进设计", 《煤矿机械》 * |
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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: 20150311 |