CN204342289U - The hydraulic control system of small size hoisting crane - Google Patents
The hydraulic control system of small size hoisting crane Download PDFInfo
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- CN204342289U CN204342289U CN201420716651.6U CN201420716651U CN204342289U CN 204342289 U CN204342289 U CN 204342289U CN 201420716651 U CN201420716651 U CN 201420716651U CN 204342289 U CN204342289 U CN 204342289U
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- over valve
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Abstract
The utility model discloses a kind of hydraulic control system of small size hoisting crane, comprise Hydraulic Pump and lifting motor, described lifting motor two oil inlets are communicated with the second working port with the first working port of change-over valve one respectively, 3rd working port of described change-over valve one is communicated with fuel tank oil inlet with Hydraulic Pump oil outlet respectively with the 4th working port, shuttle valve and balance cock is connected in parallel between described lifting motor two oil inlets, described have shuttle valve outlet to be communicated with the second working port of change-over valve two, first working port of described change-over valve two is communicated with hydraulic brake oil inlet, described hydraulic brake oil outlet is communicated with described fuel tank oil inlet, the control port of described hydraulic brake is communicated with by the control port of oil circuit control with described lifting motor.The utility model has following characteristics: load running velocity-stabilization, stable, long service life, and reasonable in design, cost advantage is obvious.
Description
Technical field
The utility model belongs to elevator machinery technical field, relates to a kind of hydraulic efficiency pressure system, is specifically related to a kind of hydraulic control system of small size hoisting crane.
Background technology
At present, domestic 8 tons and following little tonnage car hosit because its cost is low, volume is little, lightweight, road environment is required that the factor such as low plays an increasingly important role in the capital construction of town and country, the market demand significantly improves year by year.Hydraulic efficiency pressure system many employings enclosed variable system of external lifting mechanism, in enclosed variable system, the obstructed fuel tank of the oil return of lifting motor directly flows to the oil inlet port of Hydraulic Pump, the horsepower output of driving engine is given full play within the scope that simultaneity factor can be able to regulate at volume adjustable hydraulic pump, reduce the power dissipation that driving engine is unnecessary, but adopt enclosed variable system comparatively complicated when designing, simultaneously the manufacture process requirement of volume adjustable hydraulic pump and cost all higher.The job requirement of the hydraulic efficiency pressure system of little tonnage car hosit is not high, does not need so complicated design.
Utility model content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, provides a kind of hydraulic control system of small size hoisting crane, and its load running velocity-stabilization is stable, long service life, reasonable in design, and cost advantage is obvious, is convenient to promote the use of.
For achieving the above object, the technical solution adopted in the utility model is: a kind of hydraulic control system of small size hoisting crane, comprise and provide the Hydraulic Pump of pressurized hydraulic oil for system and driven by pressurized hydraulic oil and provide the lifting motor of output torque for lifting mechanism, it is characterized in that: described lifting motor two oil inlets are communicated with the second working port with the first working port of change-over valve one respectively, 3rd working port of described change-over valve one is communicated with fuel tank oil inlet with Hydraulic Pump oil outlet respectively with the 4th working port, shuttle valve and balance cock is connected in parallel between described lifting motor two oil inlets, described shuttle valve outlet is communicated with the second working port of change-over valve two, 3rd working port of described change-over valve two is communicated with described fuel tank oil inlet, first working port of described change-over valve two is communicated with hydraulic brake oil inlet, described hydraulic brake oil outlet is communicated with described fuel tank oil inlet, the control port of described hydraulic brake is communicated with by the control port of oil circuit control with described lifting motor.
The hydraulic control system of above-mentioned small size hoisting crane, is characterized in that: be provided with one-way damper valve between the first working port of described change-over valve two and braking liquid cylinder pressure oil inlet.
The hydraulic control system of above-mentioned small size hoisting crane, is characterized in that: described Hydraulic Pump oil outlet place is provided with by pass valve.
The hydraulic control system of above-mentioned small size hoisting crane, is characterized in that: described fuel tank oil inlet is provided with check valve.
The hydraulic control system of above-mentioned small size hoisting crane, is characterized in that: described change-over valve one is three position four-way directional control valve, and described change-over valve two is two-bit triplet change-over valve.
The utility model compared with prior art has the following advantages:
(1) hydraulic control system of this small size hoisting crane adopts open type quantitative system, and quantitative hydraulic POF is constant, thus load running velocity-stabilization.
(2) hydraulic control system of this small size hoisting crane is stable, long service life.
(3) hydraulic control system design of this small size hoisting crane is reasonable, adopts open type quantitative system, and thus its structure is simple, has obvious cost advantage, be thus convenient to promote the use of compared with enclosed variable system.
Below by drawings and Examples, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is hydraulic control principle schematic of the present utility model.
Description of reference numerals:
1-Hydraulic Pump; 2-change-over valve one; 3-by pass valve;
4-shuttle valve; 5-balance cock; 6-lifting motor;
7-hydraulic brake; 8-one-way damper valve; 9-change-over valve two;
10-check valve; 11-fuel tank.
Detailed description of the invention
The hydraulic control system of a kind of small size hoisting crane as shown in Figure 1, comprise and provide the Hydraulic Pump 1 of pressurized hydraulic oil for system and driven by pressurized hydraulic oil and provide the lifting motor 6 of output torque for lifting mechanism, the A mouth of described lifting motor 6 is communicated with S mouth with the R mouth of change-over valve 1 respectively with B mouth, the T mouth of described change-over valve 1 is communicated with fuel tank 11 oil inlet with Hydraulic Pump 1 oil outlet respectively with P mouth, shuttle valve 4 and balance cock 5 is connected in parallel between the A mouth of described lifting motor 6 and B mouth, described shuttle valve 4 outlet is communicated with the N mouth of change-over valve 29, the Q mouth of described change-over valve 29 is communicated with described fuel tank 11 oil inlet, the M mouth of described change-over valve 29 is communicated with hydraulic brake 7 oil inlet, described hydraulic brake 7 oil outlet is communicated with described fuel tank 11 oil inlet, the control port of described hydraulic brake 7 is communicated with by the control port of oil circuit control with described lifting motor 6.
In the present embodiment, between the M mouth of described change-over valve 29 and braking liquid cylinder pressure 7 oil inlet, be provided with one-way damper valve 8.
In the present embodiment, described Hydraulic Pump 1 oil outlet place is provided with by pass valve 3.
In the present embodiment, described fuel tank 11 oil inlet is provided with check valve 10.
In the present embodiment, described change-over valve 1 is three position four-way directional control valve, and described change-over valve 29 is two-bit triplet change-over valve.
The working process of the hydraulic control system of the utility model small size hoisting crane is: when change-over valve 1 is placed in left position, a Hydraulic Pump 1 hydraulic oil part out enters into hydraulic brake 7 through shuttle valve 4, change-over valve 29 and one-way damper valve 8, and hydraulic brake 7 is unlocked.Another part enters the A mouth of lifting motor 6 after the check valve in balance cock 5, and treat that hydraulic brake 7 is back to fuel tank 11 by change-over valve 1 after opening again, load weight is hoisted.When change-over valve 1 is placed in right position, hydraulic oil opens hydraulic brake 7 on the one hand, enter the right side hydraulic fluid port of lifting motor 6 on the other hand, treat that hydraulic brake 7 is back to fuel tank 11 by the throttle chink of balance cock 5 and change-over valve 1 after opening again, load weight speed limit under the effect of balance cock 5 declines.
When change-over valve 29 is placed in bottom, the spring of hydraulic brake 7 resets under the effect of predetermincd tension, and hydraulic brake 7 is in the state of brake sticking brake.The individual event dash pot valve 8 be connected with hydraulic brake 7 plays a part to delay drg and opens, the operating mode that prevents from hoisting causes the load weight segment distance that first glides to hoist again because hydraulic brake 7 when system pressure is also not enough to reach force value needed for load opens, i.e. double slide phenomenon.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent structure transformation, all still belong in the protection domain of technical solutions of the utility model.
Claims (5)
1. the hydraulic control system of a small size hoisting crane, comprise and provide the Hydraulic Pump of pressurized hydraulic oil (1) for system and driven by pressurized hydraulic oil and provide the lifting motor (6) of output torque for lifting mechanism, it is characterized in that: described lifting motor (6) two oil inlets are communicated with the second working port with the first working port of change-over valve one (2) respectively, 3rd working port of described change-over valve one (2) is communicated with fuel tank (11) oil inlet with Hydraulic Pump (1) oil outlet respectively with the 4th working port, shuttle valve (4) and balance cock (5) is connected in parallel between described lifting motor (6) two oil inlets, described shuttle valve (4) outlet is communicated with the second working port of change-over valve two (9), 3rd working port of described change-over valve two (9) is communicated with described fuel tank (11) oil inlet, first working port of described change-over valve two (9) is communicated with hydraulic brake (7) oil inlet, described hydraulic brake (7) oil outlet is communicated with described fuel tank (11) oil inlet, the control port of described hydraulic brake (7) is communicated with by the control port of oil circuit control with described lifting motor (6).
2. according to the hydraulic control system of small size hoisting crane according to claim 1, it is characterized in that: between the first working port of described change-over valve two (9) and braking liquid cylinder pressure (7) oil inlet, be provided with one-way damper valve (8).
3. according to the hydraulic control system of small size hoisting crane according to claim 1, it is characterized in that: described Hydraulic Pump (1) oil outlet place is provided with by pass valve (3).
4. according to the hydraulic control system of small size hoisting crane according to claim 1, it is characterized in that: described fuel tank (11) oil inlet is provided with check valve (10).
5. according to the hydraulic control system of small size hoisting crane according to claim 1, it is characterized in that: described change-over valve one (2) is three position four-way directional control valve, described change-over valve two (9) is two-bit triplet change-over valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420716651.6U CN204342289U (en) | 2014-11-24 | 2014-11-24 | The hydraulic control system of small size hoisting crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420716651.6U CN204342289U (en) | 2014-11-24 | 2014-11-24 | The hydraulic control system of small size hoisting crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204342289U true CN204342289U (en) | 2015-05-20 |
Family
ID=53225575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420716651.6U Expired - Fee Related CN204342289U (en) | 2014-11-24 | 2014-11-24 | The hydraulic control system of small size hoisting crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204342289U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971954A (en) * | 2016-07-28 | 2016-09-28 | 安徽环球传动科技有限公司 | Method for effectively guaranteeing normal braking of hydraulic motor drive |
-
2014
- 2014-11-24 CN CN201420716651.6U patent/CN204342289U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971954A (en) * | 2016-07-28 | 2016-09-28 | 安徽环球传动科技有限公司 | Method for effectively guaranteeing normal braking of hydraulic motor drive |
| CN105971954B (en) * | 2016-07-28 | 2018-02-02 | 安徽环球传动科技有限公司 | A kind of method that fluid motor-driven normal brake application is effectively ensured |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 Termination date: 20151124 |