CN201474962U - Dual input shaft differential gear pump - Google Patents
Dual input shaft differential gear pump Download PDFInfo
- Publication number
- CN201474962U CN201474962U CN2009201468352U CN200920146835U CN201474962U CN 201474962 U CN201474962 U CN 201474962U CN 2009201468352 U CN2009201468352 U CN 2009201468352U CN 200920146835 U CN200920146835 U CN 200920146835U CN 201474962 U CN201474962 U CN 201474962U
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- input shaft
- pump
- planetary pinion
- power
- gear
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Abstract
The utility model relates to a dual-input shaft differential gear pump. A main power input shaft is driven by a three-phase asynchronous motor at fixed rotating speed without frequency conversion control and provides mostly power required by a pump; a control input shaft is driven by a servo motor; the output flow of the pump can be changed by changing the rotating speed and the rotating direction of the servo motor, so high-power driving and low-power control can be realized; and the utility model is particularly suitable for a variable-flow energy-saving hydraulic system with high power of over 1,00 kilowatts, high response and frequent speed change.
Description
Technical field
The utility model dual input shaft differential gear pump is a kind of form of Hydraulic power units gear pump, with existing gear pump difference is to have two power input shafts, an active force input shaft and a control power input shaft, the active force input shaft can be decided rotating speed with threephase asynchronous machine and drive, provide pump required most of power, the control power input shaft with servo or variable-frequency motor variable speed with turn to driving, change POF, realize high-power cost drive, the high response of small-power controlling and driving purpose, can save high-power servo or frequency conversion control unit, be particularly suitable for high-power energy saving hydraulic system more than hundred kilowatts.
Background technique
Present high-power variable speed unsteady flow amount energy-saving hydraulic system all adopts single action power input shaft oil hydraulic pump, change the oil hydraulic pump output flow by frequency conversion or actuating motor speed governing, because control, driver element power is big, so the cost height, response is low, the control unit power consumption is big.
Summary of the invention
For solving high-power variable speed energy-saving hydraulic system cost height, respond low, big this technical barrier of loss, the utility model provides a kind of dual input shaft differential gear pump, dual input shaft differential gear pump utilizes two degrees of freedom principles of ZK-H differential gear train, have two power input shafts, the active force input shaft is decided rotating speed with threephase asynchronous machine and is driven, need not VFC, provide pump required most of power, the control power input shaft is by frequency conversion or driven by servomotor, by changing frequency conversion or actuating motor rotating speed and turning to the output flow that changes pump, realize the control of high-power driving small-power.
The utility model dual input shaft differential gear pump belongs to 2K-H differential gear train structure, press gear pump job requirement design, planetary pinion and internal gear engagement constitute crescent gear pump, external gear pump is formed in planetary pinion and central sun gear engagement, most of power is by the input of active force input shaft, drive the rotation of internal gear constant speed, control power is by the input of control power input shaft, drive central sun gear, POF is by the rotating speed decision of the relative tie-rod H of planetary pinion, the rotating speed of the relative tie-rod H of planetary pinion is by the relative rotation speed decision of central sun gear and internal gear, when center sun gear and internal gear rotate with angular velocity in the same way, planetary pinion, central sun gear, internal gear and tie-rod H rotate synchronously, and each gear and tie-rod H relative velocity are zero, and POF is zero.When center sun gear rotating speed less than the internal gear rotating speed, the tie-rod rotating speed descends, and the relative tie-rod H of planetary pinion begins rotation, and POF rises, this stage control power input shaft drive motor is operated in engine condition, and its electric energy can return electrical machinery of active force by the energy recovery type frequency variator.When center sun gear rotating speed drops to zero, control power input shaft drive motor output power is zero.The sun gear rotating speed is opposite with internal gear when the center, control power input shaft drive motor output power, and pump input power is the output power sum of two motors.The relative rotation speed difference of control input shaft and active force input shaft is big more, and the rotating speed of the relative tie-rod H of planetary pinion is just high more, and POF is big more.Change the relative rotation speed of control input shaft and active force input shaft, i.e. the output flow of can regulate dual input shaft differential gear pump.
International and domestic at present, the hydraulic system energy-saving scheme has the rotating speed of deciding to become two kinds of discharge capacity and fixed displacement variable speeds, decide the employed variable displacement pump of rotating speed change discharge capacity scheme and limited by technical specifications, and discharge capacity is limited, and single pump power is about 100 kilowatts.Fixed displacement variable speed scheme, high-power frequency conversion controller oneself power consumption are just big, and control accuracy is low, cost is high, though high-power driven by servomotor precision height, high-power actuating motor and drive controller cost an arm and a leg.The utility model provides a kind of dual input shaft differential gear pump, most of power is provided by the rotation of threephase asynchronous machine constant speed, turning to and rotating speed of the servo or variable-frequency motor control centre sun gear of small-power, change the output flow of pump, compare with existing high-power driven by servomotor controlling schemes, reduce more than 50% the energy-saving hydraulic system of high-power more than 100 kilowatts, high response that the utility model is particularly suitable for, busy shift with the power overall cost.
Description of drawings
Shown in Figure 1 is the axial cross-sectional schematic of the utility model dual input shaft differential gear pump, (1) active force input shaft wherein, (2) pump case, (3) inlet port, (4) right sideboard circular groove, (5) filler opening, (6) right sideboard, (7) internal gear, (8) spacing block, (9) oil drain out, (10) left sideboard, (11) left sideboard circular groove, (12) screw, (13) planetary pinion, (14) planet pin, (15) back-up ring, (16) control power input shaft, (17) oil outlet, (18) pump end cap.
Fig. 2 is the cross-sectional schematic of Figure 1A-A, wherein (5) filler opening totally 6 draw with dot and dash line, (9) oil drain out totally 6 use depicted as solid lines.
Specific embodiment
A kind of dual input shaft differential gear pump, active force input shaft (1) places the mesopore of pump case (2), the other end pusher dog inserts in the water jacket of internal gear (7), can drive internal gear (7) rotation, internal gear (7) and planetary pinion (13) engagement, planetary pinion (13) mesopore inserts planet pin (14), planetary pinion (13) can rotate freely, planet pin (14) two ends respectively with right sideboard (6) and left sideboard (10) drive fit, by back-up ring (15) axial limiting, planetary pinion (13) is inboard to be meshed with the central sun gear of controlling on the power input shaft (16), internal gear (7), planetary pinion (13), central sun gear clamping on the control power input shaft (16) is between right sideboard (6) and left sideboard (11), and leave the common gear of micro-gap and rotate, pump end cap (18) mesopore and control power input shaft (16) Spielpassung, and it is fastening by screw (12) and pump case (2), spacing block (8) is fixed on right sideboard (6) and the left sideboard (10), spacing block (8) and ring gear (7), central sun gear Spielpassung on planetary pinion (13) and the control power input shaft (16), spacing block (8), ring gear (7), central sun gear on planetary pinion (13) and the control power input shaft (16) is contour, spacing block (8) effect is to form clearance seal with each gear teeth tips, isolate the high low pressure chamber, an end face of right sideboard (6) and left sideboard (10) has two circular grooves, right sideboard circular groove (4) is connected with filler opening (5), inlet port (3) is connected with right sideboard circular groove (4), the effect of right sideboard circular groove (4) is to remain inlet port (3) to link up with filler opening (5) when right sideboard (6) rotates, left sideboard circular groove (11) is connected with oil drain out (9), oil outlet (17) is connected with left sideboard circular groove (11), and the effect of left sideboard circular groove (11) is to remain oil drain out (9) to link up with oil outlet (17) when left sideboard (10) rotates.
The working procedure of the utility model dual input shaft differential gear pump is described, when internal gear (7) turns clockwise by shown in Figure 2, the relative internal gear of central sun gear (7) on the control power input shaft (16) is rotated counterclockwise, planetary pinion (13) internal gear (7) relatively turns clockwise, filler opening (5) regional space enlarges, liquid enters filler opening (5) from inlet port (3) through right sideboard circular groove (4) and enters between cog, oil drain out (9) regional space reduces simultaneously, liquid enters left sideboard circular groove (11) from oil drain out (9) and discharges from oil outlet (17), with planetary pinion (13) center symmetric arrangement advance oil drain out in like manner.The rotating speed of the relative internal gear of central sun gear (7) on the control power input shaft (16) is more little, and the rotating speed of the relative tie-rod H of planetary pinion (13) is more little, and POF is more little.The rotating speed of the relative internal gear of central sun gear (7) on the control power input shaft (16) is big more, and the rotating speed of the relative tie-rod H of planetary pinion (13) is big more, and POF is big more.
Claims (1)
1. dual input shaft differential gear pump, active force input shaft (1) places the mesopore of pump case (2), the other end pusher dog inserts in the water jacket of internal gear (7), can drive internal gear (7) rotation, internal gear (7) and planetary pinion (13) engagement, planetary pinion (13) mesopore inserts planet pin (14), planetary pinion (13) can rotate freely, planet pin (14) two ends respectively with right sideboard (6) and left sideboard (10) drive fit, by back-up ring (15) axial limiting, planetary pinion (13) is inboard to be meshed with the central sun gear of controlling on the power input shaft (16), internal gear (7), planetary pinion (13), central sun gear clamping on the control power input shaft (16) is between right sideboard (6) and left sideboard (11), and leave the common gear of micro-gap and rotate, pump end cap (18) mesopore and control power input shaft (16) Spielpassung, and it is fastening by screw (12) and pump case (2), it is characterized in that stretching out the end face of pump case (2) by the active force input shaft (1) that pusher dog connects with internal gear (7), for the main driving force input, one end of control power input shaft (16) stretches in active force input shaft (1) endoporus and active force input shaft (1) endoporus Spielpassung, the other end stretches out the end face of pump end cap (18), for the input of control power, active force input shaft (1) and the coaxial tandem arrangement of control power input shaft (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201468352U CN201474962U (en) | 2009-03-31 | 2009-03-31 | Dual input shaft differential gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201468352U CN201474962U (en) | 2009-03-31 | 2009-03-31 | Dual input shaft differential gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201474962U true CN201474962U (en) | 2010-05-19 |
Family
ID=42411208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201468352U Expired - Fee Related CN201474962U (en) | 2009-03-31 | 2009-03-31 | Dual input shaft differential gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201474962U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117755273A (en) * | 2023-12-07 | 2024-03-26 | 中联重科股份有限公司 | Control method for hybrid power system, hybrid power system and controller |
-
2009
- 2009-03-31 CN CN2009201468352U patent/CN201474962U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117755273A (en) * | 2023-12-07 | 2024-03-26 | 中联重科股份有限公司 | Control method for hybrid power system, hybrid power system and controller |
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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: 20100519 Termination date: 20180331 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |