CN104314784B - A kind of powered controls be integrated in casing of hydraulic pump - Google Patents
A kind of powered controls be integrated in casing of hydraulic pump Download PDFInfo
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- CN104314784B CN104314784B CN201410569079.XA CN201410569079A CN104314784B CN 104314784 B CN104314784 B CN 104314784B CN 201410569079 A CN201410569079 A CN 201410569079A CN 104314784 B CN104314784 B CN 104314784B
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Abstract
The invention discloses a kind of powered controls be integrated in casing of hydraulic pump, comprise the plunger pump shell that inside is provided with swash plate, the variable flow valve at control valve group and control swash plate angle of inclination is separately installed with in plunger pump shell, control valve group at least comprises and to be matched the control valve that forms and being matched the selector valve formed by the first valve pocket and the first spool by the second valve pocket and the second spool, variable flow valve comprises the variable valve seat and variable spool and the variable shifting block for stirring swash plate that are equipped with mutually, between variable flow valve and the first valve pocket, hinge has the leverage of the negative feedback control selector valve valve port openings of sizes formed by variable spool travel, valve port comprises filler opening and return opening, plunger pump shell is provided with regulating valve seat assembly, and plunger pump shell is shaped with Stress control oil and enters the control oil duct that control valve controls selector valve.Compact structure of the present invention, volume is little, and merit matter is than high, and feature richness, the Miniaturization Design for hydraulic equipment provides a new path.
Description
Technical field
The present invention relates to engineering machinery field, particularly relate to the hydraulic control technology in engineering machinery field, specifically a kind of powered controls be integrated in casing of hydraulic pump.
Background technique
Development along with industrial technology and the enhancing with environmental consciousness, when current energy source is in short supply, increasing industry starts to focus on energy-saving and emission-reduction and environmental protection, and every field is all doing one's utmost to carry out energy-saving design.Engineering machinery, as the field of a high energy consumption, thus has boundless Energy-saving reformation space.In prior art, the power limitation control of axial plunger type hydraulic pump all changes swashplate angle by stroking mechanism and realizes, stroking mechanism more common at present is generally designed to arrange forward control mechanism and Reverse Turning Control mechanism respectively at the two ends of swash plate, and two mechanisms are controlled by the control valve part be arranged on outside pump case.This control mechanism not only complex structure, bulky, and also required parts are various, and manufacture cost is high, and inconvenience is installed in assembly, is therefore difficult to the miniaturization realizing hydraulic equipment.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned prior art present situation, and provides compact structure, and volume is little, merit matter than high, feature richness, a kind of powered controls be integrated in casing of hydraulic pump conveniently installed and used.
The present invention solves the problems of the technologies described above adopted technological scheme: a kind of powered controls be integrated in casing of hydraulic pump, comprise the plunger pump shell that inside is provided with swash plate, be separately installed with control valve group in plunger pump shell and for forward and reverse control swash plate angle of inclination to adjust the variable flow valve of plunger stroke, control valve group at least comprises and being matched the control valve that forms and being matched the selector valve formed by the first valve pocket and the first spool of controlling by this control valve by the second valve pocket and the second spool, variable flow valve comprises the variable valve seat and variable spool and the variable shifting block for stirring swash plate that are equipped with mutually, between variable flow valve and the first valve pocket, hinge has the leverage of the negative feedback control selector valve valve port openings of sizes formed by variable spool travel, the large end that it is variable spool that valve port comprises through selector valve provides the filler opening of Stress control oil and controls the return opening of oil through the large end pressure of selector valve drain charge variable spool, plunger pump shell is provided with the regulating valve seat assembly for adjusting control valve group and variable flow valve operating pressure, and plunger pump shell is shaped with Stress control oil and enters the control oil duct that control valve controls selector valve.
For optimizing technique scheme, the measure taked also comprises:
The driving lever that it is axis of rotation that above-mentioned leverage comprises with driving lever pin, one end hinge of driving lever is on the first valve pocket, and the other end and the setting sleeve of this driving lever fit over the variable shifting block phase hinge on variable spool.
The first above-mentioned valve pocket is provided with step pin, driving lever is shaped with the pin-and-hole be rotatably assorted with this step pin, variable shifting block is provided with block poking pin, and driving lever has the cotter way with one end open matched with block poking pin, and driving lever pin is arranged on relatively near one end of step pin.
Above-mentioned plunger pump shell is through is shaped with control valve group chamber, control valve group also comprise by the 3rd valve pocket and the 3rd spool match form for controlling and the precontrol valve reserved for additional other in follow-up system; Precontrol valve, control valve and selector valve are fitted in the control valve group chamber of plunger pump shell successively.
Above-mentioned variable flow valve is fitted in the variable valve pocket that plunger pump shell is shaped with, variable valve seat apical grafting is in the large end side of variable spool, the accent that variable valve pocket is positioned at variable spool small end is provided with the second plug screw, and control valve group chamber is provided with the first plug screw with the left accent installing second plug screw the same side.
Above-mentioned regulating valve seat assembly comprises to be fixed equipped regulating valve seat and is arranged in regulating valve seat for the threaded mandrel of adjustable diameter and screw adjusting variable flow valve and the pressure regulator valve for default selector valve cracking pressure size with plunger pump shell, threaded mandrel and variable valve seat phase apical grafting, and threaded mandrel is equipped with Ejector pin lock jack panel.
Above-mentioned pressure regulator valve comprises the pressure adjusting spring seat, pressure regulation big spring, pressure regulation little spring and the pressure regulation valve rod that to be fitted in successively through silk braid in regulating valve seat; Pressure adjusting spring seat left side and the first spool right side phase apical grafting, silk braid spiral is provided with the screw press connect with pressure regulator valve masthead, and screw press is fitted with pressure regulation locking nut.
Above-mentioned pressure regulation big spring and pressure regulation little spring are nested setting, and the two ends of pressure regulation big spring respectively with pressure adjusting spring seat and silk braid phase apical grafting, the two ends of pressure regulation little spring respectively with pressure adjusting spring seat and pressure regulation valve rod phase apical grafting.
Above-mentioned plunger pump shell is provided with the shuttle valve be made up of two one-way valves, filler opening is communicated with the oil outlet end of shuttle valve, and is shaped with the connection oil outlet end of shuttle valve and the oil duct of variable spool (52) small end in plunger pump shell.
Above-mentioned plunger pump shell at least has P1 pressure oil port and P2 pressure oil port, shuttle valve two oil inlet end is connected with P2 pressure oil port with P1 pressure oil port respectively, the Stress control oil of filler opening is the pressure oil on compare Qiang mono-tunnel in P1 pressure oil port and P2 pressure oil port two-way pressure oil, the pressure oil of two-way different pressures of the Stress control oil entering control valve for being provided by P1 pressure oil port and P2 pressure oil port respectively.
Compared with prior art, the present invention in plunger pump shell integrated be assembled with control valve group and for forward and reverse control swash plate angle of inclination to adjust variable flow valve and the leverage of plunger stroke, design of the present invention by forward and reverse for swash plate control integration together, control in one end of swash plate, not only reduce the volume of swash plate itself and substantially reduce the volume of pump global design.In addition control valve and variable spool are distributed in close plane by this design, are integrated in pump case inside, substantially reduce global design volume.The present invention can also Modulating Power scope easily as required, is provided with precontrol valve and can be used for additional other in follow-up system and controls, thus also greatly widened application area of the present invention.
The present invention not only can complete pump power limitation control, and compact structure, and volume is little, and merit matter is than high, and feature richness, the Miniaturization Design for hydraulic equipment provides a new path.
Accompanying drawing explanation
Fig. 1 is the mechnical servo power limitation control mechanism principle figure of the embodiment of the present invention;
Fig. 2 is the partial structurtes schematic diagram of swash plate of the present invention and variable flow valve;
Fig. 3 is the partial structurtes schematic diagram of leverage of the present invention and control valve group and variable flow valve;
Fig. 4 is the partial structurtes schematic diagram of control valve group of the present invention and variable flow valve;
Fig. 5 is the sectional structure chart of regulating valve seat assembly of the present invention;
Fig. 6 is integrated with oil hydraulic pump plan view of the present invention;
Fig. 7 is the left view of Fig. 6;
Fig. 8 is the right elevation of Fig. 6.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Fig. 1 to Fig. 5 is structural representation of the present invention.
Reference character is wherein: filler opening A, return opening B, plug cock E, plunger pump shell 1, swash plate 11, selector valve 2, first valve pocket 21, first spool 22, control valve 3, second valve pocket 31, second spool 32, precontrol valve 4, 3rd valve pocket 41, 3rd spool 42, variable flow valve 5, variable valve seat 51, variable spool 52, variable shifting block 53, leverage 6, driving lever 61, step pin 62, driving lever pin 63, block poking pin 64, regulating valve seat assembly 7, regulating valve seat 71, threaded mandrel 72, Ejector pin lock jack panel 73, silk braid 74, pressure adjusting spring seat 75, pressure regulation big spring 76, pressure regulation little spring 77, pressure regulation valve rod 78, screw press 79, first plug screw 81, second plug screw 82, shuttle valve 9.
As shown in Figures 1 to 5, a kind of powered controls be integrated in casing of hydraulic pump of the present invention, comprise the plunger pump shell 1 that inside is provided with swash plate 11, be separately installed with control valve group in plunger pump shell 1 and for forward and reverse control swash plate 11 angle of inclination to adjust the variable flow valve 5 of plunger stroke, control valve group at least comprises and being matched the control valve 3 that forms and being matched the selector valve 2 formed by the first valve pocket 21 and the first spool 22 of controlling by this control valve by the second valve pocket 31 and the second spool 32, variable flow valve 5 comprises the variable valve seat 51 and variable spool 52 and the variable shifting block 53 for stirring swash plate 11 that are equipped with mutually, between variable flow valve 5 and the first valve pocket 21, hinge has the leverage 6 of the negative feedback control selector valve 2 valve port openings of sizes formed by variable spool 52 displacement, the large end that it is variable spool 52 that valve port comprises through selector valve 2 provides the filler opening A of Stress control oil and controls the return opening B of oil through the large end pressure of selector valve 2 drain charge variable spool 52, the opening and closing of filler opening A and return opening B or the size of opening are decided by the relative movement of the first valve pocket 21 and the first spool 22, plunger pump shell 1 is provided with the regulating valve seat assembly 7 for adjusting control valve group and variable flow valve 5 operating pressure, and plunger pump shell 1 is shaped with Stress control oil and enters the control oil duct that control valve 3 controls selector valve 2.In prior art, the more common stroking mechanism of oil hydraulic pump is designed to, and arrange forward control mechanism and Reverse Turning Control mechanism respectively at the two ends of swash plate, two mechanisms are controlled by the control valve part be arranged on outside pump case, and its volume is large, and control mechanism is complicated.The present invention utilizes variable spool 52 and variable shifting block 53 to be controlled in one end of swash plate by forward and reverse control integration of swash plate 11, not only reduces the volume of swash plate 11 itself and substantially reduces the volume of pump global design.Control valve group of the present invention and variable flow valve 5 are distributed in close plane in plunger pump shell 1.The present invention not only can complete pump power limitation control, and compact structure, and volume is little, and merit matter is than high, and feature richness, the Miniaturization Design for hydraulic equipment provides a new path.
Be optimize this product further in embodiment, as shown in Figure 3, the driving lever 61 that it is axis of rotation that leverage 6 of the present invention comprises with driving lever pin 63, one end hinge of driving lever 61 is on the first valve pocket 21, and the other end and the setting sleeve of this driving lever 61 fit over the variable shifting block 53 phase hinge on variable spool 52.
First valve pocket 21 is provided with step pin 62, driving lever 61 is shaped with the pin-and-hole be rotatably assorted with this step pin 62, variable shifting block 53 is provided with block poking pin 64, driving lever 61 has the cotter way with one end open matched with block poking pin 64, and driving lever pin 63 is arranged on relatively near one end of step pin 62.It is connected with the first valve pocket 21 corresponding to the first spool 22 by two hinges lever that variable spool 52 of the present invention is consisted of step pin 62 and block poking pin 64 and driving lever 61, makes the displacement of the first spool 22 obtain a reverse feedback converted by variable spool 52 displacement.
As can be seen from Fig. 2 and Fig. 4, plunger pump shell 1 is through is shaped with control valve group chamber, and control valve group is arranged in control valve group chamber.The simultaneously variable valve pocket that is also shaped with of plunger pump shell 1, variable flow valve 5 is fitted in variable valve pocket.In order to the control making the present invention can also increase other, control valve group of the present invention also comprise by the 3rd valve pocket 41 and the 3rd spool 42 match form for controlling and the precontrol valve 4 reserved for additional other in follow-up system; Precontrol valve 4, control valve 3 and selector valve 2 are fitted in the control valve group chamber of plunger pump shell 1 successively.As can see from Figure 4, be shaped with pre-control oil duct in plunger pump shell 1, when plunger pump does not load other control, pre-control oil duct is shut by plug cock E, can open when needed.
As shown in Figure 2 and Figure 4, variable valve seat 51 apical grafting is in the large end side of variable spool 52, the accent that variable valve pocket is positioned at variable spool 52 small end is provided with the second plug screw 82, and control valve group chamber is provided with the first plug screw 81 with the left accent installing second plug screw 82 the same side.
Fig. 5 is the structural representation of regulating valve seat assembly 7 of the present invention, and regulating valve seat assembly 7 is mainly used in the operating pressure of Moderator Variable valve 5 and selector valve 2.Regulating valve seat assembly 7 comprises with the fixing equipped regulating valve seat 71 of plunger pump shell 1 and is arranged in regulating valve seat 71 for the threaded mandrel 72 of adjustable diameter and screw adjusting variable flow valve 5 and the pressure regulator valve for default selector valve 2 cracking pressure size, threaded mandrel 72 and variable valve seat 51 phase apical grafting, and threaded mandrel 72 is equipped with Ejector pin lock jack panel 73.After threaded mandrel 72 is adjusted to the right place, by Ejector pin lock jack panel 73, threaded mandrel 72 can be locked, loosen to prevent threaded mandrel 72.
Pressure regulator valve of the present invention comprises the pressure adjusting spring seat 75, pressure regulation big spring 76, pressure regulation little spring 77 and the pressure regulation valve rod 78 that to be fitted in successively through silk braid 74 in regulating valve seat 71; Pressure adjusting spring seat 75 left side and the first spool 22 right side phase apical grafting, silk braid 74 spiral is provided with the screw press 79 with pressure regulation valve rod 78 apical grafting, and screw press 79 is fitted with pressure regulation locking nut.The in like manner effect of pressure regulation locking nut is locked by the screw press 79 of adjusting to the right place.
As shown in Figure 5, pressure regulation big spring 76 and pressure regulation little spring 77 are nested setting, and the two ends of pressure regulation big spring 76 respectively with pressure adjusting spring seat 75 and silk braid 74 phase apical grafting, the two ends of pressure regulation little spring 77 respectively with pressure adjusting spring seat 75 and pressure regulation valve rod 78 phase apical grafting.
Can see from Fig. 1 He in Fig. 3, plunger pump shell 1 of the present invention is provided with the shuttle valve 9 be made up of two one-way valves, filler opening A is communicated with the oil outlet end of shuttle valve 9, and is shaped with the connection oil outlet end of shuttle valve 1 and the oil duct of variable spool 52 small end in plunger pump shell 1.
In embodiment, plunger pump shell 1 at least has P1 pressure oil port and P2 pressure oil port, shuttle valve 9 liang of oil inlet ends are connected with P2 pressure oil port with P1 pressure oil port respectively, the Stress control oil of filler opening A is the pressure oil on compare Qiang mono-tunnel in P1 pressure oil port and P2 pressure oil port two-way pressure oil, the pressure oil of two-way different pressures of the Stress control oil entering control valve 3 for being provided by P1 pressure oil port and P2 pressure oil port respectively.
From Fig. 6 to Fig. 8 for applying a kind of invariable power plunger pump structure of the present invention, as we can see from the figure plunger pump shell 1 is also shaped with P3 pressure oil port and S1 hydraulic fluid port, S2 hydraulic fluid port, L1 hydraulic fluid port and L2 hydraulic fluid port.
Working principle of the present invention is as shown in Figure 1:
The oil hydraulic pump that in Fig. 1, corresponding two discharge capacities of P1 pressure oil port and P2 pressure oil port are adjustable, two pump discharge pressures are by after the shuttle valve 9 that is made up of two one-way valves, and selector valve 2 place be made up of the first spool 22 and the first valve pocket 21 received by pressure Gao mono-road pressure oil.Two pump discharge pressure oil directly guide to the second spool 32 left side step from an other road, a thrust is to the right acted on to the first spool 22, jointly form the spring force set by pressure regulation big spring 76 with pressure regulation little spring 77 in this thrust and regulating valve seat assembly 7 to compare, then decision selector valve 2 whether commutate and commutate after result.When pump discharge pressure raises, when the thrust of generation is higher than spring force setting value, left position changed to by selector valve 2, filler opening A now in Fig. 4 opens, the large end of high-pressure oil entering variable spool 52, the active area of large end is large, so the thrust suffered by large end of variable spool 52 is large, promote variable spool 52 to move, the mobile variable shifting block 53 that drives of variable spool 52 moves, and through the transmission of variable shifting block 53, drives pump swash plate 11 inclination angle to reduce, thus pump delivery is diminished, flow diminishes, otherwise when pump discharge pressure reduces, when the thrust produced is less than the spring force setting value of pressure regulation big spring 76 and pressure regulation little spring 77, right position changed to by selector valve 2, return opening B now in Fig. 4 opens, the low pressure oil of large end through return opening B and plunger pump shell 1 inside of variable spool 52 is connected, the thrust of large end is reduced, variable spool 52 small end is by high pressure oil effect, when the thrust of small end is greater than the thrust of large end, promote variable spool 52 to mobile in the other direction, through the transmission of variable shifting block 53, pump swash plate 11 inclination angle is driven to increase, pump displacement is made to become large, flow becomes large.Wherein, it is connected with the first valve pocket 21 corresponding to the first spool 22 with a lever by two hinges by variable spool 52, thus make the displacement of the first spool 22 obtain a reverse feedback converted by variable spool 52 displacement, finally be revealed as the aperture size of the valve port formed between the first spool 22 and the first valve pocket 21, pressure after can at every moment being completed by variable is compared with the desired pressure reached, obtain difference revise variable further after pressure, make variable result infinite approach with expection ideal value.Spring force of the present invention is provided by different two springs of length and pressure regulation big spring 76 and pressure regulation little spring 77, can approximate simulation invariable power curve.Power P=pressure p × flow q.So just achieve the power limitation control that the product of the pressure of pump and flow is at every moment constant.
Spring force of the present invention is set up within the specific limits by silk braid 74 and screw press 79, so the invariable power curve of pump can regulate in certain limit.
The present invention not only can complete pump power limitation control, and compact structure, and volume is little, and merit matter is than high, and feature richness, the Miniaturization Design for hydraulic equipment provides a new path.
Claims (10)
1. one kind is integrated in the powered controls in casing of hydraulic pump, comprise the plunger pump shell (1) that inside is provided with swash plate (11), it is characterized in that: be separately installed with control valve group in described plunger pump shell (1) and for forward and reverse control swash plate (11) angle of inclination to adjust the variable flow valve (5) of plunger stroke, described control valve group at least comprises and being matched the control valve (3) that forms and being matched the selector valve (2) formed by the first valve pocket (21) and the first spool (22) of controlling by this control valve by the second valve pocket (31) and the second spool (32), described variable flow valve (5) comprises the variable valve seat (51) and variable spool (52) and the variable shifting block (53) for stirring swash plate (11) that are equipped with mutually, between described variable flow valve (5) and the first valve pocket (21), hinge has the leverage (6) of negative feedback control selector valve (2) the valve port openings of sizes formed by variable spool (52) displacement, the large end that it is variable spool (52) that described valve port comprises through selector valve (2) provides the filler opening of Stress control oil (A) and controls the return opening (B) of oil through the large end pressure of selector valve (2) drain charge variable spool (52), described plunger pump shell (1) is provided with the regulating valve seat assembly (7) for adjusting control valve group and variable flow valve (5) operating pressure, and plunger pump shell (1) is shaped with Stress control oil and enters the control oil duct that control valve (3) controls selector valve (2).
2. a kind of powered controls be integrated in casing of hydraulic pump according to claim 1, it is characterized in that: the driving lever (61) that it is axis of rotation that described leverage (6) comprises with driving lever pin (63), one end hinge of described driving lever (61) is on the first valve pocket (21), and the other end and the setting sleeve of this driving lever (61) fit over variable shifting block (53) the phase hinge on variable spool (52).
3. a kind of powered controls be integrated in casing of hydraulic pump according to claim 2, it is characterized in that: described the first valve pocket (21) is provided with step pin (62), described driving lever (61) is shaped with the pin-and-hole be rotatably assorted with this step pin (62), described variable shifting block (53) is provided with block poking pin (64), described driving lever (61) has the cotter way with one end open matched with block poking pin (64), and described driving lever pin (63) is arranged on relatively near one end of step pin (62).
4. a kind of powered controls be integrated in casing of hydraulic pump according to claim 3, it is characterized in that: described plunger pump shell (1) is through is shaped with control valve group chamber, described control valve group also comprise by the 3rd valve pocket (41) and the 3rd spool (42) match form for controlling and the precontrol valve (4) reserved for additional other in follow-up system; Described precontrol valve (4), control valve (3) and selector valve (2) are fitted in the control valve group chamber of plunger pump shell (1) successively.
5. a kind of powered controls be integrated in casing of hydraulic pump according to claim 4, it is characterized in that: described variable flow valve (5) is fitted in the variable valve pocket that plunger pump shell (1) is shaped with, described variable valve seat (51) apical grafting is in the large end side of variable spool (52), the accent that described variable valve pocket is positioned at variable spool (52) small end is provided with the second plug screw (82), and described control valve group chamber is provided with the first plug screw (81) with the left accent installing the second plug screw (82) the same side.
6. a kind of powered controls be integrated in casing of hydraulic pump according to claim 5, it is characterized in that: described regulating valve seat assembly (7) comprises the regulating valve seat (71) fixing equipped with plunger pump shell (1) and is arranged in regulating valve seat (71) for the threaded mandrel (72) of adjustable diameter and screw adjusting variable flow valve (5) and the pressure regulator valve for default selector valve (2) cracking pressure size, described threaded mandrel (72) and variable valve seat (51) phase apical grafting, and threaded mandrel (72) is equipped with Ejector pin lock jack panel (73).
7. a kind of powered controls be integrated in casing of hydraulic pump according to claim 6, is characterized in that: described pressure regulator valve comprises the pressure adjusting spring seat (75), pressure regulation big spring (76), pressure regulation little spring (77) and the pressure regulation valve rod (78) that to be fitted in successively through silk braid (74) in regulating valve seat (71); Described pressure adjusting spring seat (75) left side and the first spool (22) right side phase apical grafting, described silk braid (74) spiral is provided with the screw press (79) with pressure regulation valve rod (78) apical grafting, and described screw press (79) is fitted with pressure regulation locking nut.
8. a kind of powered controls be integrated in casing of hydraulic pump according to claim 7, it is characterized in that: described pressure regulation big spring (76) and pressure regulation little spring (77) are nested setting, and the two ends of described pressure regulation big spring (76) respectively with pressure adjusting spring seat (75) and silk braid (74) phase apical grafting, the two ends of described pressure regulation little spring (77) respectively with pressure adjusting spring seat (75) and pressure regulation valve rod (78) phase apical grafting.
9. a kind of powered controls be integrated in casing of hydraulic pump according to claim 8, it is characterized in that: described plunger pump shell (1) is provided with the shuttle valve (9) be made up of two one-way valves, described filler opening (A) is communicated with the oil outlet end of shuttle valve (9), and is shaped with the oil outlet end of connection shuttle valve (9) and the oil duct of variable spool (52) small end in described plunger pump shell (1).
10. a kind of powered controls be integrated in casing of hydraulic pump according to claim 9, it is characterized in that: described plunger pump shell (1) at least has P1 pressure oil port and P2 pressure oil port, described shuttle valve (9) two oil inlet end is connected with P2 pressure oil port with P1 pressure oil port respectively, the Stress control oil of described filler opening (A) is the pressure oil on compare Qiang mono-tunnel in P1 pressure oil port and P2 pressure oil port two-way pressure oil, the pressure oil of the oily two-way different pressures for being provided by P1 pressure oil port and P2 pressure oil port respectively of the described Stress control entering control valve (3).
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| CN201410569079.XA CN104314784B (en) | 2014-10-23 | 2014-10-23 | A kind of powered controls be integrated in casing of hydraulic pump |
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| CN201410569079.XA CN104314784B (en) | 2014-10-23 | 2014-10-23 | A kind of powered controls be integrated in casing of hydraulic pump |
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| CN104314784B true CN104314784B (en) | 2016-04-20 |
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| CN108457829A (en) * | 2017-02-17 | 2018-08-28 | 佛山市科达液压机械有限公司 | A kind of band unloading starts the Variable plunger pump of control function |
| CN107781126B (en) * | 2017-11-22 | 2023-12-05 | 江苏恒立液压科技有限公司 | Hydraulic pump control valve |
| CN109854471A (en) * | 2019-02-01 | 2019-06-07 | 中航力源液压股份有限公司 | The hydraulic planger pump of two grades of power control devices |
| CN112628101B (en) * | 2020-12-07 | 2022-09-16 | 宁波恒力液压股份有限公司 | Flow control valve for plunger pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS55151179A (en) * | 1979-05-14 | 1980-11-25 | Daikin Ind Ltd | Variable displacement type hydraulic pump |
| JPS55151183A (en) * | 1979-05-15 | 1980-11-25 | Daikin Ind Ltd | Variable displacement type hydraulic apparatus |
| JPS61255286A (en) * | 1985-05-07 | 1986-11-12 | Daikin Ind Ltd | Control device for variable capacity type pump |
| CN204212936U (en) * | 2014-10-23 | 2015-03-18 | 宁波广天赛克思液压有限公司 | A kind of powered controls be integrated in casing of hydraulic pump |
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Address after: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Applicant after: SAIKESI HYDRAULIC TECHNOLOGY CO., LTD. Address before: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Applicant before: Ningbo Wide Sky SKS Hydraulic Co., Ltd. |
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| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |