CN203009430U - Rotary cushion valve, rotary hydraulic system and engineering machinery - Google Patents
Rotary cushion valve, rotary hydraulic system and engineering machinery Download PDFInfo
- Publication number
- CN203009430U CN203009430U CN 201220712942 CN201220712942U CN203009430U CN 203009430 U CN203009430 U CN 203009430U CN 201220712942 CN201220712942 CN 201220712942 CN 201220712942 U CN201220712942 U CN 201220712942U CN 203009430 U CN203009430 U CN 203009430U
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- valve
- mouth
- rotary
- pilot
- communicated
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Abstract
The utility model provides a rotary cushion valve, a rotary hydraulic system and engineering machinery. The rotary cushion valve comprises a pilot-type overflow valve which is provided with a main valve and a pilot valve, and a time-delay pressure-reducing device which is used for delaying pressure change in a spring cavity is arranged on a pilot oil channel from the main valve to the pilot valve. According to the rotary cushion valve, the time-delay pressure-reducing device such as a damping hole and a flexible container is arranged on the pilot oil channel of the pilot-type overflow valve; and by using the time-delay function of the damping hole or the volume effect of the flexible container, the pressure-reducing process of the main valve of the pilot-type overflow valve is delayed, so that the rotary cushion valve can be opened when impacted, a problem that the overflow valve (high set pressure) cannot be opened when impacted by a low pressure in the rotation process is solved, and a relatively effective rotary cushion effect is achieved.
Description
Technical field
The utility model relates to engineering machinery field, particularly a kind of rotary buffering valve, Hydraulic slewing system and engineering machinery.
Background technique
In general, the rotary inertia of engineering machinery swing mechanism is larger, easily causes revolution to impact when stopping, and has had a strong impact on the handling of revolution action.Rotary buffering valve is exactly to be used for controlling revolution action hydraulic package, and existing rotary buffering valve is generally to be communicated with rotary motor A mouth, B mouth (or pressure release is to T mouth) by relief valve and one-way valve, to realize pooling feature.Its working principle is when rotary motor A mouth, when the B mouth pressure reaches the relief valve cracking pressure, and relief valve is opened, and realizes that rotary motor A mouth, B mouth are communicated with (or pressure release is to T mouth).Swirl gear is when high speed rotary, and the system pressure value is very high, and when idling was turned round, system pressure was very low, be to satisfy two kinds of operating modes, the set pressure of relief valve during all with high speed rotary required pressure be as the criterion.But when the normal running revolution stops, be the idling revolution certainly, system shock pressure is generally lower, and this makes relief valve is normally off, can not effectively realize pooling feature.
The model utility content
In view of this, the utility model is intended to propose a kind of rotary buffering valve, Hydraulic slewing system and engineering machinery, can not realize the problem of pooling feature to solve rotary motor rotary buffering valve when idling is turned round.
For achieving the above object, the technical solution of the utility model is achieved in that
On the one hand, the utility model provides a kind of rotary buffering valve, comprise the pilot-type relief valve that is provided with main valve and pilot valve, be provided with pressure be used to the spring chamber that makes described main valve at described main valve to guide's oil circuit of described pilot valve and change the time-delay that lags behind and build pressure device.
Further, described time-delay is built to press-fit and is set to time-delay damping piece and/or additional cavity volume spare.
Further, described time-delay damping piece is damping hole, annular space damping piece or thread pitch damping piece.
Further, described additional cavity volume spare is to be connected on the elasticity oil pipe of described main valve to guide's oil circuit of described pilot valve.
Further, described additional cavity volume spare is to be connected to elastic container or the accumulator of described main valve to guide's oil circuit of described pilot valve.
Further, described pilot-type relief valve is provided with remote control orifice, and described elastic container or accumulator are communicated with described spring chamber by described remote control orifice.
On the other hand, the utility model provides a kind of Hydraulic slewing system, comprises rotary motor and controls the selector valve of its commutation, also includes rotary buffering valve as above, the A mouth of described rotary motor, B mouth respectively with the oil inlet P of described rotary buffering valve
1The oil inlet P that unilaterally connected, described unilaterally connected are hydraulic oil from the A mouth of described rotary motor or B mouth way flow to described rotary buffering valve
1, the oil return inlet T of described rotary buffering valve
1Take back fuel tank.
Further, described rotary motor by with door type shuttle valve and described rotary buffering valve unilaterally connected, described two filler openings with door type shuttle valve are communicated with A mouth, the B mouth of described rotary motor respectively, described and the oil outlet of door type shuttle valve and the oil inlet P of described rotary buffering valve
1Be communicated with.
Further, described rotary motor is by the first one-way valve, the second one-way valve and described rotary buffering valve unilaterally connected, the filler opening of described the first one-way valve and the second one-way valve is communicated with B mouth, the A mouth of described rotary motor respectively, the oil outlet of described the first one-way valve and the second one-way valve be interconnected and with the oil inlet P of described rotary buffering valve
1Be communicated with.
Further, also comprise the negative moment Fill valve, described negative moment Fill valve comprises the 3rd one-way valve and the 4th one-way valve, the filler opening of described the 3rd one-way valve and the 4th one-way valve is interconnected and is communicated with fuel tank, and the oil outlet of described the 3rd one-way valve and the 4th one-way valve is communicated with B mouth, the A mouth of described rotary motor respectively.
Further, be provided with back pressure valve at described fuel tank to the oil circuit of described negative moment Fill valve, the filler opening of described back pressure valve is communicated with described fuel tank, and the oil outlet of described back pressure valve is communicated with the filler opening of described the 3rd one-way valve and the 4th one-way valve simultaneously.
On the one hand, the utility model also provides a kind of engineering machinery that is provided with above-mentioned Hydraulic slewing system again.
Further, described engineering machinery is hoist.
With respect to prior art, the utlity model has following advantage:
(1) rotary buffering valve described in the utility model arranges a time-delay decompressor on guide's oil circuit of pilot-type relief valve, as damping hole, elastic container etc., utilize the time-lag action of damping hole or the volume effect of elastic container, delay the pressure process of building of the main valve of this pilot-type relief valve, this rotary buffering valve just can be opened being subject to impacting, solved the problem that when the turning course mesolow impacts, relief valve (set pressure is high) can't be opened, more efficiently realization revolution buffering.
(2) Hydraulic slewing system described in the utility model also is provided with the negative moment Fill valve, and is can be in the sense of rotation of the direction of moment of face and rotary motor identical when causing oil pump feed not enough, is the rotary motor repairing; Filler opening place at this negative moment Fill valve also is provided with back pressure valve, makes repairing more abundant.
Description of drawings
The accompanying drawing that consists of a part of the present utility model is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the schematic diagram of the described rotary buffering valve of the utility model embodiment and Hydraulic slewing system.
Description of reference numerals:
The 1-selector valve, 2-rotary motor, 3-pilot-type relief valve, 31-main valve, 32-pilot valve, 41-damping hole, 42-elastic container, 51-the first one-way valve, 52-the second one-way valve, 61-the 3rd one-way valve, 62-the 4th one-way valve, 71-back pressure valve, 72-the 5th one-way valve.
Embodiment
Need to prove, in the situation that do not conflict, embodiment and the feature in embodiment in the utility model can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
The present embodiment provides a kind of rotary buffering valve, as shown in mark 3 in Fig. 1, this rotary buffering valve is one and comprises main valve 31 and pilot valve 32 with the pilot-type relief valve 3 of remote control orifice, and the place also is connected with a damping hole 41 and an elastic container 42 at this remote control orifice.Specific works process and cushioning principle about this rotary buffering valve further illustrate in described Hydraulic slewing system below again, repeat no more here.
The present embodiment also provides a kind of Hydraulic slewing system, be provided with rotary buffering valve as above in this hydraulic system, Fig. 1 is relevant drawings, as shown in FIG., this Hydraulic slewing system comprises rotary motor 2 and controls the selector valve 1 of its commutation, also comprises rotary buffering valve, negative moment Fill valve and back pressure valve 71.This selector valve 1 is three six logical pilot operated directional control valves, and this selector valve 1 comprises P, T, A
1, B
1Four main hydraulic fluid ports and a, two control ports of b, the P mouth is filler opening, the T mouth is return opening, A
1Mouth and B
1Mouth is communicated with A mouth, the B mouth of rotary motor 2 respectively, and a mouth, b mouth connect the spool commutation that the guide oil liquid pipeline is controlled selector valve 1.The oil inlet P of this rotary buffering valve
1Pass through respectively B mouth, the A mouth unilaterally connected of the first one-way valve 51 and the second one-way valve 52 and rotary motor 2, namely the filler opening of this first one-way valve 51 and the second one-way valve 52 is communicated with B mouth, the A mouth of rotary motor 2 respectively, the oil outlet of this first one-way valve 51 and the second one-way valve 52 be interconnected and with the oil inlet P of rotary buffering valve
1Be communicated with the oil outlet T of this rotary buffering valve
1Be communicated with the return opening of selector valve 1, and be communicated with fuel tank by the 5th one-way valve 72 and this back pressure valve 71, the filler opening of the oil outlet of the 5th one-way valve 72 and this back pressure valve 71 is interconnected and is communicated with fuel tank, the oil outlet of the filler opening of the 5th one-way valve 72 and this back pressure valve 71 be interconnected and with the T mouth of this selector valve 1 and the oil outlet T of this rotary buffering valve
1Be communicated with.This negative moment Fill valve comprise that the filler opening of the 3rd one-way valve 61 and the 4th one-way valve 62, the three one-way valves 61 and the 4th one-way valve 62 is interconnected and with the oil outlet T of rotary buffering valve
1And the connection of the oil outlet of back pressure valve 71, the oil outlet of the 3rd one-way valve 61 and the 4th one-way valve 62 is communicated with B mouth, the A mouth of rotary motor 2 respectively.When the spool of this selector valve 1 is meta, the oil outlet T of its oil inlet P and rotary buffering valve
1Be communicated with.
The main practical function of this Hydraulic slewing system is as follows:
Function one, normal revolution.Pilot pressure enters the spool end of selector valve 1 through a mouth, b mouth, drive selector valve 1 commutation, realizes the motor revolution, A
1Mouth, B
1Mouth pressure is chosen through the second one-way valve 52, the first one-way valve 51, gets the hydraulic oil effect of pressure the higher person in both to the oil inlet P of pilot-type relief valve 3
1And on guide's oil circuit, if occur impacting A in turning course
1Or B
1Mouthful pressure surge can occur, the pressure on guide's oil circuit also can change thereupon thereupon, but due to the damping effect of volume effect and the damping hole 41 of elastic container 42, the pressure of main valve 31 spring chambers changes and can lag behind the regular hour, and then makes oil inlet P
1Pressure can overcome the spring force of main valve 31 spring chambers, 31 moments of main valve are opened, A
1Mouth, B
1Mouth is communicated with, and makes revolution more steady.
Function two, normally turn round overload protection.In normal turning course, if A
1Mouth, B
1In mouthful, the pressure rise of any side is to the setting pressure of the pilot valve 32 of pilot-type relief valve 3, and pilot-type relief valve 3 will be opened off-load, A
1Mouth, B
1Mouth is communicated with, and the high pressure oil off-load realizes overload protection.
Function three, negative moment repairing.If the sense of rotation of the direction of moment of face and rotary motor 2 identical (during as heavy duty, revolution by at a high speed to idling; Or the car phenomenon appears slipping in revolution), rotary motor 2 will speed up revolution, and oil pump feed is not enough, causes a side negative pressure, and return pressure will be opened the 3rd one-way valve 61 or the 4th one-way valve 62 repairings this moment, and back pressure valve 71 can improve return oil pressure, makes repairing more abundant.
Function four, the revolution buffering that stops.When stopping turning round, A
1Mouth, B
1Compression shock will appear in mouth, due to the volume effect of elastic container 42, although A
1Mouth, B
1Mouth does not reach the cracking pressure of pilot-type relief valve 3, and pilot-type relief valve 3 also can be opened moment, A
1Mouth, B
1Mouth is communicated with, and the surge pressure off-load realizes buffering.
Other mode of executions as above-described embodiment: this rotary motor 2 can also by with door type shuttle valve and rotary buffering valve unilaterally connected, two filler openings that are shuttle valve are communicated with A mouth, the B mouth of rotary motor 2 respectively, the oil outlet of shuttle valve and the oil inlet P of rotary buffering valve
1Be communicated with; This damping hole 41 and elastic container 42 can two select one, also can use together; This elastic container 42 can also be accumulator, or at main valve 31 long elasticity pipeline of series connection to guide's oil circuit of pilot valve 32; This damping hole 41 can also be annular space damping piece or thread pitch damping piece etc.
Except above-mentioned Hydraulic slewing system, the utility model also provides a kind of engineering machinery that is provided with above-mentioned Hydraulic slewing system, particularly a kind of hoist, and the structure of other each several part of this hoist is with reference to prior art, and this paper repeats no more.
The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (12)
1. rotary buffering valve, comprise the pilot-type relief valve (3) that is provided with main valve (31) and pilot valve (32), it is characterized in that, be provided with pressure be used to the spring chamber that makes described main valve (31) at described main valve (31) to guide's oil circuit of described pilot valve (32) and change the time-delay that lags behind and build pressure device.
2. rotary buffering valve according to claim 1, is characterized in that, described time-delay is built to press-fit and is set to time-delay damping piece and/or additional cavity volume spare.
3. rotary buffering valve according to claim 2, is characterized in that, described time-delay damping piece is damping hole (41), annular space damping piece or thread pitch damping piece.
4. rotary buffering valve according to claim 2, is characterized in that, described additional cavity volume spare is for being connected on the elasticity oil pipe of described main valve (31) to guide's oil circuit of described pilot valve (32).
5. rotary buffering valve according to claim 2, is characterized in that, described additional cavity volume spare is for being connected to elastic container (42) or the accumulator of described main valve (31) to guide's oil circuit of described pilot valve (32).
6. rotary buffering valve according to claim 5, is characterized in that, described pilot-type relief valve (3) is provided with remote control orifice, and described elastic container (42) or accumulator are communicated with described spring chamber by described remote control orifice.
7. Hydraulic slewing system, comprise rotary motor (2) and control the selector valve (1) that described rotary motor (2) commutates, it is characterized in that, also include rotary buffering valve as described in any one in claim 1 to 6, the A mouth of described rotary motor (2), B mouth respectively with the oil inlet P of described rotary buffering valve
1The oil inlet P that unilaterally connected, described unilaterally connected are hydraulic oil from the A mouth of described rotary motor (2) or B mouth way flow to described rotary buffering valve
1, the oil return inlet T of described rotary buffering valve
1Take back fuel tank.
8. Hydraulic slewing system according to claim 7, it is characterized in that, described rotary motor (2) by with door type shuttle valve and described rotary buffering valve unilaterally connected, described two filler openings with door type shuttle valve are communicated with A mouth, the B mouth of described rotary motor (2) respectively, described and the oil outlet of door type shuttle valve and the oil inlet P of described rotary buffering valve
1Be communicated with.
9. Hydraulic slewing system according to claim 7, it is characterized in that, described rotary motor (2) is by the first one-way valve (51), the second one-way valve (52) and described rotary buffering valve unilaterally connected, the filler opening of described the first one-way valve (51) and the second one-way valve (52) is communicated with B mouth, the A mouth of described rotary motor (2) respectively, the oil outlet of described the first one-way valve (51) and the second one-way valve (52) be interconnected and with the oil inlet P of described rotary buffering valve
1Be communicated with.
10. according to claim 8 or 9 described Hydraulic slewing system, it is characterized in that, also comprise the negative moment Fill valve, described negative moment Fill valve comprises the 3rd one-way valve (61) and the 4th one-way valve (62), the filler opening of described the 3rd one-way valve (61) and the 4th one-way valve (62) is interconnected and is communicated with fuel tank, and the oil outlet of described the 3rd one-way valve (61) and the 4th one-way valve (62) is communicated with B mouth, the A mouth of described rotary motor (2) respectively.
11. Hydraulic slewing system according to claim 10, it is characterized in that, be provided with back pressure valve (71) at described fuel tank to the oil circuit of described negative moment Fill valve, the filler opening of described back pressure valve (71) is communicated with described fuel tank, and the oil outlet of described back pressure valve (71) is communicated with the filler opening of described the 3rd one-way valve (61) and the 4th one-way valve (62) simultaneously.
12. an engineering machinery is characterized in that, described engineering machinery is provided with Hydraulic slewing system as described in claim 7 to 11 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220712942 CN203009430U (en) | 2012-12-21 | 2012-12-21 | Rotary cushion valve, rotary hydraulic system and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220712942 CN203009430U (en) | 2012-12-21 | 2012-12-21 | Rotary cushion valve, rotary hydraulic system and engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203009430U true CN203009430U (en) | 2013-06-19 |
Family
ID=48601027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220712942 Expired - Fee Related CN203009430U (en) | 2012-12-21 | 2012-12-21 | Rotary cushion valve, rotary hydraulic system and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203009430U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883575A (en) * | 2012-12-21 | 2014-06-25 | 三一重工股份有限公司 | Rotary cushion valve, rotary hydraulic system and engineering machine |
| CN104192739A (en) * | 2014-09-09 | 2014-12-10 | 徐州重型机械有限公司 | Rotary system and crane |
| CN107917111A (en) * | 2017-09-12 | 2018-04-17 | 上海立新液压有限公司 | A kind of efficient windlass valve group |
| CN108591177A (en) * | 2018-07-13 | 2018-09-28 | 徐州重型机械有限公司 | Turn round buffer unit, rotary control system and engineering machinery |
| CN108757613A (en) * | 2018-06-20 | 2018-11-06 | 徐州重型机械有限公司 | Rotary control valve group, rotary control system and crane |
| CN109592585A (en) * | 2018-12-12 | 2019-04-09 | 三汽车起重机械有限公司 | Crane rotation braking system and crane |
-
2012
- 2012-12-21 CN CN 201220712942 patent/CN203009430U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883575A (en) * | 2012-12-21 | 2014-06-25 | 三一重工股份有限公司 | Rotary cushion valve, rotary hydraulic system and engineering machine |
| CN103883575B (en) * | 2012-12-21 | 2017-02-22 | 三一汽车起重机械有限公司 | Rotary cushion valve, rotary hydraulic system and engineering machine |
| CN104192739A (en) * | 2014-09-09 | 2014-12-10 | 徐州重型机械有限公司 | Rotary system and crane |
| CN104192739B (en) * | 2014-09-09 | 2016-03-30 | 徐州重型机械有限公司 | Rotary system and hoisting crane |
| CN107917111A (en) * | 2017-09-12 | 2018-04-17 | 上海立新液压有限公司 | A kind of efficient windlass valve group |
| CN108757613A (en) * | 2018-06-20 | 2018-11-06 | 徐州重型机械有限公司 | Rotary control valve group, rotary control system and crane |
| CN108591177A (en) * | 2018-07-13 | 2018-09-28 | 徐州重型机械有限公司 | Turn round buffer unit, rotary control system and engineering machinery |
| CN109592585A (en) * | 2018-12-12 | 2019-04-09 | 三汽车起重机械有限公司 | Crane rotation braking system and crane |
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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: 20130619 Termination date: 20201221 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |