CN201539375U - Control transformer of cam plate variable plunger pump - Google Patents
Control transformer of cam plate variable plunger pump Download PDFInfo
- Publication number
- CN201539375U CN201539375U CN2009202810686U CN200920281068U CN201539375U CN 201539375 U CN201539375 U CN 201539375U CN 2009202810686 U CN2009202810686 U CN 2009202810686U CN 200920281068 U CN200920281068 U CN 200920281068U CN 201539375 U CN201539375 U CN 201539375U
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- China
- Prior art keywords
- piston
- oilhole
- oil
- spool
- shifting block
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- Expired - Fee Related
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Abstract
The utility model provides a control transformer of a cam plate variable plunger pump. The control transformer comprises a casing, two oil cavities, an inner cavity and a guide groove are arranged on the casing, a rotating block is arranged in the inner cavity, the rotating block is hinged with the casing via a cylinder pin, a valve bush is arranged in the casing, two oil holes are arranged on the lateral wall of the valve bush, a spool is arranged in the valve bush, an annular boss for sealing the second oil cavity is arranged in the middle of the spool and corresponds to the second oil cavity, an oil groove is arranged on the lateral wall of the spool, one end of the spool extends into the inner cavity, one end of the casing is provided with a regulator casing, a guide sleeve is arranged in the regulator casing, a guide rod is arranged in the guide sleeve, one end of the guide rod is provided with a spring seat, a spring is mounted on the periphery of the guide rod, a shifting block is arranged in a guide groove and provided with a mounting hole, a piston is arranged in the mounting hole, a piston oil hole and a piston side oil hole are arranged in the piston, a guide block is arranged on the shifting block, two oil holes of the shifting blocks are arranged in the guide block, the second oil hole of the shifting blocks is communicated with the mounting hole, and a plunger is mounted in the first oil hole of the shifting block.
Description
Technical field
The utility model relates to the accent flow meter of a kind of engineering machinery with pump, the controlled variable device of inclined disc type Variable plunger pump.
Background technique
There is the apparatus structure complexity of inner controlled variable device in the controlled variable device of existing inclined disc type Variable plunger pump, can not in time adjust the problem of pump delivery flexibly, can't satisfy people's user demand.
Summary of the invention
The purpose of this utility model provides a kind of controlled variable device of inclined disc type Variable plunger pump, and it can solve the problem that prior art exists, and can adjust pump delivery flexibly in time, to satisfy the motion requirement that operating members such as engineering machinery mechanical arm are done.
The utility model for achieving the above object, be achieved through the following technical solutions: the controlled variable device of inclined disc type Variable plunger pump, comprise housing, offer first oil pocket, second oil pocket, inner chamber and guiding groove on the housing, guiding groove communicates with inner chamber, moving block is installed in the inner chamber, and the end face of moving block is a triangle, and moving block is hinged by straight pin and housing; Valve pocket is installed in the housing, offer two oilholes on the sidewall of valve pocket, spool is installed in the valve pocket, the spool middle part is provided with the annular boss of sealing second oil pocket, annular boss is corresponding with second oil pocket, offers oil groove on the sidewall of spool, and oil groove communicates with two oilholes on the sleeve side wall, two oilholes on the sleeve side wall communicate with first oil pocket and second oil pocket respectively, and an end of spool stretches in the inner chamber; One end of housing is installed governor body, and guide sleeve is installed in the governor body, and guide rod is installed in the guide sleeve, an end mounting spring seat of guide rod, and the periphery mounting spring of guide rod, an end of spring contacts with spring seat, and the other end of spring contacts with guide sleeve; Shifting block is installed in the guiding groove, offer mounting hole on the shifting block, piston is installed in the mounting hole, one end diameter of piston is greater than the diameter of its other end, offer piston oilhole and piston side oilhole in the piston, the piston side oilhole communicates with the piston oilhole, guide pad is set on the shifting block, guide pad is positioned at guiding groove, offer shifting block first oilhole and shifting block second oilhole in the guide pad, shifting block second oilhole communicates with shifting block first oilhole, and shifting block second oilhole communicates with described mounting hole, plunger is installed in shifting block first oilhole, and an end of plunger stretches in the inner chamber and contacts with moving block.
In order further to realize the purpose of this utility model, can also be by the following technical solutions: offer positioning hole on the spring seat, an end of spool be positioned at positioning hole.One end periphery of spool is provided with spacing block set.
Advantage of the present utility model is: it can realize that the constant current amount is regulated control and permanent power functions is regulated the effect of controlling, and can satisfy people's user demand.Move when the swash plate angle of pump reaches the maximum shifting block that drives, thereby make oil pressure change the angle that the plunger height changes moving block, play the effect that constant voltage is dammed thereby spool is held out against.It can more make full use of the power of motor, and qualified distribution and utilize flow is particularly suitable for engineering machinery and uses under bad working environments, can reduce energy waste to greatest extent.The utility model also has tight icepro simple in structure, cheap for manufacturing cost and safe and reliable advantage.
Description of drawings
Fig. 1 is a structural representation of the present utility model; Fig. 2 is the local structure for amplifying schematic representation of the I of Fig. 1.
Number in the figure: 1 housing, 2 moving block 3O type circles, 4 valve pockets, 5 first oil pockets, 6 spools, 7 spring seats, 8 governor bodies, 9 guide rods, 10 springs, 11 seal rings, 12 shifting blocks, 13 pistons, 14 plungers, 15 straight pins, 16 shifting blocks, first oilhole, 17 piston side oilholes, 18 piston oilholes, 19 second oil pockets, 20 oil grooves, 21 inner chambers, 22 shifting blocks, second oilhole, 23 positioning holes, 24 annular boss, 25 spacing block sets, 26 guiding grooves, 27 guide sleeves, 28 guide pads.
Embodiment
The controlled variable device of inclined disc type Variable plunger pump described in the utility model, comprise housing 1, offer inner chamber 21 and guiding groove 26 on the housing 1, guiding groove 26 communicates with inner chamber 21, moving block 2 is installed in the inner chamber 21, and the end face of moving block 2 is triangles, promptly, moving block 2 can be that end face is leg-of-mutton cylinder, and moving block 2 is hinged by straight pin 15 and housing 1; Valve pocket 4 is installed in the housing 1, offer two oilholes on the sidewall of valve pocket 4, spool 6 is installed in the valve pocket 4, spool 6 middle parts are provided with the annular boss 24 of sealing second oil pocket 19, and annular boss 24 is corresponding with second oil pocket 19, offers oil groove 20 on the sidewall of spool 6, oil groove 20 communicates with oilhole on valve pocket 4 sidewalls, offer first oil pocket 5 and second oil pocket 19 on the housing 1, two oilholes on valve pocket 4 sidewalls communicate with first oil pocket 5 and second oil pocket 19 respectively, and an end of spool 6 stretches in the inner chamber 21; One end of housing 1 is installed governor body 8, and guide sleeve 27 is installed in the governor body 8, and guide rod 9 is installed in the guide sleeve 27, one end mounting spring seat 7 of guide rod 9, the periphery mounting spring 10 of guide rod 9, an end of spring 10 contacts with spring seat 7, and the other end of spring 10 contacts with guide sleeve 27; Shifting block 12 is installed in the guiding groove 26, offer mounting hole on the shifting block 12, piston 13 is installed in the mounting hole, one end diameter of piston 13 is greater than the diameter of its other end, offer piston oilhole 18 and piston side oilhole 17 in the piston 13, piston side oilhole 17 communicates with piston oilhole 18, guide pad 28 is set on the shifting block 12, guide pad 28 is positioned at guiding groove 26, offer shifting block first oilhole 16 and shifting block second oilhole 22 in the guide pad 28, shifting block second oilhole 22 communicates with shifting block first oilhole 16, and shifting block second oilhole 22 communicates with mounting hole, in shifting block first oilhole 16 plunger 14 is installed, an end of plunger 14 stretches in the inner chamber 21 and contacts with moving block 2.
Existing inclined disc type Variable plunger pump, its pump displacement size are to be determined by the swash plate angle of inclination in the pump.Swash plate is swing adjustable angle of inclination, and its angle of inclination can drive moving of shifting block 12 by piston 13 and realize, promptly moving of shifting block 12 can be adjusted the interior swash plate angle of inclined disc type Variable plunger pump, thereby changes inclined disc type variable piston pump delivery.
In conjunction with drawing respectively according to the controlled variable device to the control mode of inclined disc type Variable plunger pump explanation working principle:
The constant current amount is regulated control: when installing and using, the controlled variable device is installed in the inclined disc type Variable plunger pump, hydraulic oil in the pump acts on piston 13 right-hand members all the time, for the right-hand member of piston 13 provides left thrust, at this moment, as shown in Figure 1, piston 13 left ends do not have oil pressure, and piston 13 is positioned at the limit position of high order end under the effect of right-hand member oil pressure.Hydraulic oil enters shifting block first oilhole 16 through piston oilhole 18, piston side oilhole 17 and shifting block second oilhole 22 successively and acts on plunger 14 bottoms simultaneously, plunger 14 applies moving block 2 under the effect of hydraulic oil and upwards pressure, make 2 pairs of spools 6 of moving block apply the thrust of level, spool 6 acts on horizontal thrust on the spring 10 by spring seat 7.Originally; system's hydraulic fluid pressure can not overcome the elastic force of spring 10; spool 6 is by annular boss 24 sealings second oil pocket 19; blocking first oil pocket 5 communicates with second oil pocket 19; make left end that hydraulic oil can't flow to piston 13 through second oil pocket 19 apply to the right thrust to piston 13, guarantee that piston 13 is positioned at the left end limit position and does not move, shifting block 12 does not change the angle of the swash plate of pump; guarantee that pump delivery is constant, realize constant current amount adjusting control.
Permanent power functions is regulated control: along with system pressure raises, when hydraulic oil passes through plunger 14, when moving block 2 and spool 6 act on thrust on the spring seat 7 greater than the elastic force of spring 10, the elastic force that spool 6 overcomes spring 10 moves right, annular boss 24 is removed by second oil pocket, 19 places, first oil pocket 5 and second oil pocket 19 communicate by oil groove 20, hydraulic oil is by first oil pocket 5, through oil groove 20 and second oil pocket 19 to piston 13 left end fuel feeding, the pressure of the unit area at piston 13 two ends equates at this moment, because piston 13 two ends area differences, therefore, piston 13 two ends and have pressure reduction, piston 13 is existed by the big movement tendency of holding small end, produce displacement thereby make piston 13 drive shifting block 12, shifting block 12 drives swash plate and moves, cause the swash plate angle change, the final pump delivery that changes makes the product of system pressure and discharge capacity keep a constant, and realizes permanent power functions.
For preventing to slide between spool 6 and the spring seat 7, influence control accuracy, as shown in Figure 2, can offer positioning hole 23 on the spring seat 7, an end of spool 6 is positioned at positioning hole 23.
Be that control spool 6 inserts the degree of depth of positioning holes 23, also for prevent that further spool 6 from swinging in moving process, an end periphery of spool 6 is provided with spacing block set 25.
The utility model not technology contents of detailed description is known technology.
Claims (3)
1. the controlled variable device of inclined disc type Variable plunger pump, it is characterized in that: comprise housing (1), offer first oil pocket (5), second oil pocket (19), inner chamber (21) and guiding groove (26) on the housing (1), guiding groove (26) communicates with inner chamber (21), moving block (2) is installed in the inner chamber (21), the end face of moving block (2) is a triangle, and moving block (2) is hinged by straight pin (15) and housing (1); Valve pocket (4) is installed in the housing (1), offer two oilholes on the sidewall of valve pocket (4), spool (6) is installed in the valve pocket (4), spool (6) middle part is provided with the annular boss (24) of sealing second oil pocket (19), annular boss (24) is corresponding with second oil pocket (19), offer oil groove (20) on the sidewall of spool (6), oil groove (20) communicates with two oilholes on valve pocket (4) sidewall, two oilholes on valve pocket (4) sidewall communicate with first oil pocket (5) and second oil pocket (19) respectively, and an end of spool (6) stretches in the inner chamber (21); One end of housing (1) is installed governor body (8), guide sleeve (27) is installed in the governor body (8), guide rod (9) is installed in the guide sleeve (27), one end mounting spring seat (7) of guide rod (9), the periphery mounting spring (10) of guide rod (9), one end of spring (10) contacts with spring seat (7), and the other end of spring (10) contacts with guide sleeve (27); Shifting block (12) is installed in the guiding groove (26), shifting block is offered mounting hole on (12), piston (13) is installed in the mounting hole, one end diameter of piston (13) is greater than the diameter of its other end, offer piston oilhole (18) and piston side oilhole (17) in the piston (13), piston side oilhole (17) communicates with piston oilhole (18), guide pad (28) is set on the shifting block (12), guide pad (28) is positioned at guiding groove (26), offer shifting block first oilhole (16) and shifting block second oilhole (22) in the guide pad (28), shifting block second oilhole (22) communicates with shifting block first oilhole (16), shifting block second oilhole (22) communicates with described mounting hole, plunger (14) is installed in shifting block first oilhole (16), and an end of plunger (14) stretches in the inner chamber (21) and contacts with moving block (2).
2. the controlled variable device of inclined disc type Variable plunger pump according to claim 1, it is characterized in that: offer positioning hole (23) on the spring seat (7), an end of spool (6) is positioned at positioning hole (23).
3. the controlled variable device of inclined disc type Variable plunger pump according to claim 1, it is characterized in that: an end periphery of spool (6) is provided with spacing block set (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202810686U CN201539375U (en) | 2009-12-14 | 2009-12-14 | Control transformer of cam plate variable plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202810686U CN201539375U (en) | 2009-12-14 | 2009-12-14 | Control transformer of cam plate variable plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201539375U true CN201539375U (en) | 2010-08-04 |
Family
ID=42590826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202810686U Expired - Fee Related CN201539375U (en) | 2009-12-14 | 2009-12-14 | Control transformer of cam plate variable plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201539375U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979875A (en) * | 2010-10-21 | 2011-02-23 | 吴赛珍 | Compact high-pressure plunger variable double pump |
| CN106438255A (en) * | 2016-10-28 | 2017-02-22 | 浙江大学 | Coaxial and same-side compact type variable structure applicable to bidirectional variable-displacement plunger pump |
| CN112628101A (en) * | 2020-12-07 | 2021-04-09 | 宁波恒力液压股份有限公司 | Flow control valve for plunger pump |
-
2009
- 2009-12-14 CN CN2009202810686U patent/CN201539375U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979875A (en) * | 2010-10-21 | 2011-02-23 | 吴赛珍 | Compact high-pressure plunger variable double pump |
| CN106438255A (en) * | 2016-10-28 | 2017-02-22 | 浙江大学 | Coaxial and same-side compact type variable structure applicable to bidirectional variable-displacement plunger pump |
| CN112628101A (en) * | 2020-12-07 | 2021-04-09 | 宁波恒力液压股份有限公司 | Flow control valve for plunger pump |
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100804 Termination date: 20131214 |