CN202988589U - Closed type hydraulic system using changeover valve set - Google Patents
Closed type hydraulic system using changeover valve set Download PDFInfo
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- CN202988589U CN202988589U CN 201220651463 CN201220651463U CN202988589U CN 202988589 U CN202988589 U CN 202988589U CN 201220651463 CN201220651463 CN 201220651463 CN 201220651463 U CN201220651463 U CN 201220651463U CN 202988589 U CN202988589 U CN 202988589U
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Abstract
A closed type hydraulic system using a changeover valve set relates to a hydraulic system of a crane and solves the technical problem that a hydraulic system of the existing single-pump connected single motor is many in hydraulic component, high in cost and difficult in a space distribution in order to meet working requirements of the crane. The closed type hydraulic system is characterized in that a B oil port of a variable pump is connected with a P1 oil port of the changeover valve set, an A oil port of the variable pump is connected with a P2 oil port of the changeover valve set, an A1 oil port of the changeover valve set is connected with a B oil port of a I hydraulic motor, and a B1 oil port of the changeover valve set is connected with an A oil port of the changeover valve set to form a closed type return circuit. An A2 oil port of the changeover valve set is connected with a B oil port of a II hydraulic motor, and a B2 oil port of the changeover valve set is connected with an A oil port of the II hydraulic motor to form a closed type return circuit. The closed type hydraulic system is used for hoisting equipment and has the advantages of being compact in structure, low in manufacture cost and safe and reliable in system.
Description
Technical field
The utility model relates to crane closed-type hydraulic system, particularly a kind of crane closed-type hydraulic system that adopts the transfer valve group.
Background technology
The general formation of existing crane closed-type hydraulic system as shown in Figure 1, the A actuator port of controllable capacity pump 1, B actuator port are connected with A hydraulic fluid port, the B hydraulic fluid port of HM Hydraulic Motor 2 respectively, the oily flow path direction of two way variable displacement pump 1 and uninterrupted are controlled by apportioning valve 3, when the Y102a of apportioning valve 3 electromagnet, Y102b electromagnet all not when electric, the variable piston of controllable capacity pump 1 is in meta under action of the spring, the discharge capacity of controllable capacity pump 1 is zero, there is no fluid output, and HM Hydraulic Motor 2 is not rotated.When the Y102a of apportioning valve 3 electromagnet gets when electric, the pressure oil that comes from oil circuit control enters apportioning valve 3 by the Fa mouth, the left chamber of passing ratio valve 3 entering variable pump 1 variable pistons, fluid passing ratio valve 3 oil sump tanks in the right chamber of variable piston, the variable piston makes controllable capacity pump 1 discharge capacity increase to gradually corresponding electric signal size from zero, high pressure oil flows out from the A actuator port of controllable capacity pump 1, enter the A hydraulic fluid port of HM Hydraulic Motor 2, HM Hydraulic Motor 2 begins rotation, the B actuator port of the B hydraulic fluid port fluid entering variable pump 1 of HM Hydraulic Motor 2 forms closed circuit.When the Y102b of apportioning valve 3 electromagnet gets when electric, controllable capacity pump 1 discharge capacity increases to corresponding electric signal size in the opposite direction, and high pressure oil flows out from the B hydraulic fluid port of HM Hydraulic Motor 2, thereby makes HM Hydraulic Motor 2 contrarotations.
Existing crane closed-type hydraulic system is the version that single pump connects single motor, in the operating mechanism of hoisting crane, have much and can not work simultaneously, as crawler travel and rotation of rotary table, tower arm luffing, hoist etc., if the closed fhdraulic system of each mechanism adopts single pump to connect the version of single motor, Hydraulic Pump just can not fully be used.The turntable limited space, more Hydraulic Pump, the difficulty that can cause space cloth to be set up also can increase the design difficulty of auxiliary gear box, and the layout of other structures also can be greatly affected.Controllable capacity pump is expensive in addition, and more controllable capacity pump can make cost very high.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming of prior art, a kind of closed fhdraulic system that adopts the transfer valve group is provided, the existing crane closed-type hydraulic of solution system is the version that single pump connects single motor, the mechanism of much not working is simultaneously arranged due to hoisting crane, more Hydraulic Elements, not only cost is high, and can cause the technical matters of difficulty in arrangement.
For achieving the above object, the technical solution adopted in the utility model is:
a kind of closed fhdraulic system that adopts the transfer valve group, comprise: controllable capacity pump, HM Hydraulic Motor, apportioning valve, it is characterized in that: the B hydraulic fluid port of described controllable capacity pump connects by the C1 inserted valve, the C2 inserted valve, the C3 inserted valve, the C4 inserted valve, the two-position four-way solenoid directional control valve, S1 shuttle valve network, S2 shuttle valve network, S3 shuttle valve network, S4 shuttle valve network, S5 shuttle valve network, the P1 hydraulic fluid port of the transfer valve group that S6 shuttle valve network and by pass valve form, the A hydraulic fluid port of controllable capacity pump connects the P2 hydraulic fluid port of described transfer valve group, the A1 hydraulic fluid port of described transfer valve group connects the B hydraulic fluid port of I HM Hydraulic Motor, the B1 hydraulic fluid port of described transfer valve group connects the A hydraulic fluid port of I HM Hydraulic Motor, consist of a closed circuit, the A2 hydraulic fluid port of described transfer valve group connects the B hydraulic fluid port of II HM Hydraulic Motor, and the B2 hydraulic fluid port of described transfer valve group connects the A hydraulic fluid port of II HM Hydraulic Motor, consists of another closed circuit.
The utility model compared with prior art has the following advantages and beneficial effect:
1, change the single motor configuration form of single pump connection of traditional closed fhdraulic system, controllable capacity pump is fully used, reduced manufacturing cost.
2, the transfer valve group is simple in structure, through-current capability large, it is reliable to switch, and has overcome the maloperation under traditional multiple directional control valve control, makes system safer, reliable.
3, adopt the crane hydraulic system of transfer valve group, structure is compacter, and is with the obvious advantage in limited arrangement space.
Description of drawings
Fig. 1 is the structural representation that has the crane closed-type hydraulic system now;
Fig. 2 is the hydraulic circuit of transfer valve group;
Fig. 3 is structural representation of the present utility model.
The utility model is further described by preferred embodiment below in conjunction with accompanying drawing.
The specific embodiment
As shown in Figure 2, transfer valve group 4 is by C1 inserted valve, C2 inserted valve, C3 inserted valve, C4 inserted valve, two-position four-way solenoid directional control valve D, S1 shuttle valve network, S2 shuttle valve network, S3 shuttle valve network, S4 shuttle valve network, S5 shuttle valve network, S6 shuttle valve network and by pass valve Y form.
as shown in Figure 3, a kind of closed fhdraulic system that adopts the transfer valve group, comprise: controllable capacity pump 1, HM Hydraulic Motor 2, apportioning valve 3, the B hydraulic fluid port of described controllable capacity pump 1 connects by the C1 inserted valve, the C2 inserted valve, the C3 inserted valve, the C4 inserted valve, two-position four-way solenoid directional control valve D, S1 shuttle valve network, S2 shuttle valve network, S3 shuttle valve network, S4 shuttle valve network, S5 shuttle valve network, the P1 hydraulic fluid port of the transfer valve group 4 that S6 shuttle valve network and by pass valve Y form, the A hydraulic fluid port of described controllable capacity pump 1 connects the P2 hydraulic fluid port of described transfer valve group 4, the A1 hydraulic fluid port of described transfer valve group 4 connects the B hydraulic fluid port of I HM Hydraulic Motor 2-1, the B1 hydraulic fluid port of described transfer valve group 4 connects the A hydraulic fluid port of I HM Hydraulic Motor 2-1, consist of a closed circuit, the A2 hydraulic fluid port of described transfer valve group 4 connects the B hydraulic fluid port of II HM Hydraulic Motor 2-2, the B2 hydraulic fluid port of described transfer valve group 4 connects the A hydraulic fluid port of II HM Hydraulic Motor 2-2, consist of another closed circuit, two closed circuits work independently at different time under the control of transfer valve group 4.
System when controllable capacity pump 1 does not have electric signal, does not export fluid after starting, and whole system is not worked.the given electric signal size of the Y102a electromagnet of passing ratio valve 3, the A mouth output fluid of controllable capacity pump 1 under apportioning valve 3 effects, enter the P2 mouth of transfer valve group 4, when two-position four-way solenoid directional control valve D not when electric, high pressure oil is by S1 shuttle valve network, S2 shuttle valve network, S3 shuttle valve network, S4 shuttle valve network, S5 shuttle valve network, S6 shuttle valve network acts on the C1 inserted valve through right of two-position four-way solenoid directional control valve D, the spring terminal of C2 inserted valve, make the C1 inserted valve, the C2 inserted valve is reliably closed, I HM Hydraulic Motor 2-1 and controllable capacity pump 1 isolation, the C3 inserted valve, the spring terminal of C4 inserted valve is connected with fuel tank by two-position four-way solenoid directional control valve D, open from the high-voltage oil liquid of P2 the B mouth that inserted valve C3 enters II HM Hydraulic Motor 2-2, the A mouth oil return of II HM Hydraulic Motor 2-2 is through the B2 of transfer valve group 4 mouth, the C4 inserted valve, the P1 mouth of transfer valve group 4 is got back to the B mouth of controllable capacity pump 1, form closed circuit between controllable capacity pump 1 and II HM Hydraulic Motor 2-2.When the oily flow path direction of pump changed, the hand of rotation of II HM Hydraulic Motor 2-2 changed thereupon.When two-position four-way solenoid directional control valve D gets when electric, control oil from S1 shuttle valve network, S2 shuttle valve network, S3 shuttle valve network, S4 shuttle valve network, S5 shuttle valve network, S6 shuttle valve network is reliably closed C3 inserted valve, C4 inserted valve, II HM Hydraulic Motor 2-2 and controllable capacity pump 1 isolation, I HM Hydraulic Motor 2-1 and controllable capacity pump 1 consist of closed circuit, and mode of operation is identical with the closed circuit that II HM Hydraulic Motor 2-2 and controllable capacity pump 1 consist of.
Add a transfer valve group, with a controllable capacity pump, two HM Hydraulic Motor, just can form two closed hydraulic loop that can not work simultaneously.
Claims (1)
1. closed fhdraulic system that adopts the transfer valve group, comprise: controllable capacity pump (1), HM Hydraulic Motor (2), apportioning valve (3), it is characterized in that: the B hydraulic fluid port of described controllable capacity pump (1) connects by the C1 inserted valve, the C2 inserted valve, the C3 inserted valve, the C4 inserted valve, two-position four-way solenoid directional control valve (D), S1 shuttle valve network, S2 shuttle valve network, S3 shuttle valve network, S4 shuttle valve network, S5 shuttle valve network, the P1 hydraulic fluid port of the transfer valve group (4) that S6 shuttle valve network and by pass valve (Y) form, the A hydraulic fluid port of described controllable capacity pump (1) connects the P2 hydraulic fluid port of described transfer valve group (4), the A1 hydraulic fluid port of described transfer valve group (4) connects the B hydraulic fluid port of I HM Hydraulic Motor (2-1), the B1 hydraulic fluid port of described transfer valve group (4) connects the A hydraulic fluid port of I HM Hydraulic Motor (2-1), consist of a closed circuit, the A2 hydraulic fluid port of described transfer valve group (4) connects the B hydraulic fluid port of II HM Hydraulic Motor (2-2), the B2 hydraulic fluid port of described transfer valve group (4) connects the A hydraulic fluid port of II HM Hydraulic Motor (2-2), consist of another closed circuit, two closed circuits work independently at different time under the control of transfer valve group (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220651463 CN202988589U (en) | 2012-11-30 | 2012-11-30 | Closed type hydraulic system using changeover valve set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220651463 CN202988589U (en) | 2012-11-30 | 2012-11-30 | Closed type hydraulic system using changeover valve set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202988589U true CN202988589U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220651463 Expired - Lifetime CN202988589U (en) | 2012-11-30 | 2012-11-30 | Closed type hydraulic system using changeover valve set |
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| Country | Link |
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| CN (1) | CN202988589U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105712207A (en) * | 2015-11-24 | 2016-06-29 | 徐州重型机械有限公司 | Superlift hoisting control system and hoisting machinery |
| WO2016138865A1 (en) * | 2015-03-04 | 2016-09-09 | 徐州重型机械有限公司 | Switching valve, switching hydraulic system, and crane |
| CN114151395A (en) * | 2021-10-20 | 2022-03-08 | 湖南中联重科应急装备有限公司 | Hydraulic control system of fire extinguishing and smoke exhausting robot and fire extinguishing and smoke exhausting robot |
-
2012
- 2012-11-30 CN CN 201220651463 patent/CN202988589U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016138865A1 (en) * | 2015-03-04 | 2016-09-09 | 徐州重型机械有限公司 | Switching valve, switching hydraulic system, and crane |
| US10233060B2 (en) | 2015-03-04 | 2019-03-19 | Xuzhou Heavy Machinery Co., Ltd. | Switching valve, switching hydraulic system and crane |
| CN105712207A (en) * | 2015-11-24 | 2016-06-29 | 徐州重型机械有限公司 | Superlift hoisting control system and hoisting machinery |
| CN105712207B (en) * | 2015-11-24 | 2018-01-16 | 徐州重型机械有限公司 | Setting-up elevator control system and hoisting machinery |
| CN114151395A (en) * | 2021-10-20 | 2022-03-08 | 湖南中联重科应急装备有限公司 | Hydraulic control system of fire extinguishing and smoke exhausting robot and fire extinguishing and smoke exhausting robot |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |
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| CX01 | Expiry of patent term |