CN1746517A - Hydraulic variable pump with double plunger and motor - Google Patents
Hydraulic variable pump with double plunger and motor Download PDFInfo
- Publication number
- CN1746517A CN1746517A CN 200410073104 CN200410073104A CN1746517A CN 1746517 A CN1746517 A CN 1746517A CN 200410073104 CN200410073104 CN 200410073104 CN 200410073104 A CN200410073104 A CN 200410073104A CN 1746517 A CN1746517 A CN 1746517A
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- plunger
- motor
- oil
- hydraulic
- oil circuit
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Abstract
This invention is regarding the structure of a plunger hydraulic pressure variable pump and motor, and control system, especially the structure of mutual converse replaceable plunger hydraulic pressure variable pump or plunger hydraulic pressure variable motor of the exactly the same structure. The two plungers pump and the motor comprise plungers and cylinders, hydraulic oil distribution system, and a straight reciprocating device in between the plungers. On the cylinders oil line installs a three way valve hydraulic system. The invention is of simple structure and capable of automatically controlling the discharge capacities of the pump and the motor by a solenoid valve.
Description
Technical field:
The present invention relates to the structure and the control of plunger hydraulic variable displacement pump and motor, relate in particular to the structure of the plunger hydraulic variable displacement pump or the plunger hydraulic variable displacement motor of identical in structure reverse replacement each other.
Background technique:
The variable mode of plunger hydraulic variable displacement pump all adopts and changes plunger stroke and realize in the prior art, and as swash plate plunger pump or bent axis type axial piston pump, pump structure complexity, manufacture difficulty are big.When the suction extrusion link volume of pump can not change, the output discharge capacity of pump can not change.Application number is 02139439.7, and name is called the application for a patent for invention of " double-action two plunger hydraulic drive motors ", discloses a kind of new structure, but has only related to two plunger hydraulic drive motors, and do not related to for the structure of variable displacement pump or hydraulic variable motor.
Summary of the invention:
The objective of the invention is to avoid the deficiencies in the prior art part and a kind of hydraulic variable pump with double plunger and motor are provided.
Purpose of the present invention can be by realizing by the following technical solutions: a kind of hydraulic variable pump with double plunger and motor, include plunger (6a, 6b) and plunger case (4a, 4b), said hydraulic oil distribution system, its main feature are also to include between plunger (6a, 6b) to be connected with linear reciprocating motion mechanism; The oil circuit of plunger case (4a, 4b) is provided with the two-position three-way valve hydraulic system.
Described two-position three-way valve hydraulic system includes on the oil circuit of plunger case (4a, 4b) and is serially connected with two-bit triplet solenoid valve (5
a, 5
b), valve (5
a, 5
b) during dead electricity, the oil circuit (a on the plunger case (4a, 4b)
1, a
2) corresponding and oil circuit (b
1, b
2) be communicated with; When valve (5
a, 5
b) when electric, the oil circuit (a on the then corresponding plunger case (4a, 4b)
1, a
2) communicate with inlet port (O ').
Linear reciprocating motion of the present invention mechanism comprises that transmission shaft (1) is connected with the turning axle (11) of epicyclic train tie-rod (13), turning axle (11) is set with planetary pinion (8), planetary pinion (8) and fixing internal gear (7) engagement, be provided with push rod bearing pin (10) on the end face of planetary pinion (8), the push rod (12) of the empty cover of push rod bearing pin (10) is connected with plunger (6a, 6b).Planetary pinion (8) is 1: 2 with internal gear (7) gear ratio of fixing.
The present invention is at fixed cover (2) and press between the hydraulic fluid port (P ') and be provided with accumulator (9).
Described said hydraulic oil distribution system is made up of coaxial rotating sleeve of adorning (3) on the transmission shaft and fixed cover (4), is provided with oil-collecting hole and is communicated with oil circuit on fixed cover 2; Oil circuit (the b of correspondence when the plunger oil suction
1, b
2) communicate the oil circuit (b of correspondence when plunger is pressed oil with inlet port (O ')
1, b
2) communicate with pressing hydraulic fluid port (P ').
The inlet port of described hydraulic variable pump with double plunger and motor (O ') can change oil drain out into, the pressure hydraulic fluid port (P ') can change the pressure oil inlet opening into.
The invention has the beneficial effects as follows, simple in structure, by the discharge capacity of automatic control pump of solenoid valve and motor.
Description of drawings:
Fig. 1 is the hydraulic variable pump with double plunger structure diagram;
Fig. 2 is two plunger hydraulic variable displacement motor structure diagrams;
The principle schematic that a bit (push rod) on Fig. 3 planetary pinion does reciprocating linear motion.
Embodiment:
Be described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing:
See Fig. 1, hydraulic variable pump with double plunger has plunger 6a, 6b and plunger case 4a, 4b, is serially connected with two-bit triplet solenoid valve 5 on the oil circuit of plunger case 4a, 4b
a, 5
b, valve 5
a, 5
bDuring dead electricity, the oil circuit a on plunger case 4a, the 4b
1, a
2Correspondence and oil circuit b
1, b
2Be communicated with, when valve 5
a, 5
bWhen electric, the oil circuit a on then corresponding plunger case 4a, the 4b
1, a
2O ' communicates with inlet port.Between plunger 6a, 6b, be connected with linear reciprocating motion mechanism.Transmission shaft 1 is connected with the turning axle 11 of epicyclic train tie-rod 13, turning axle 11 is set with planetary pinion 8, planetary pinion 8 and fixing internal gear 7 engagements are provided with push rod bearing pin 10 on the end face of planetary pinion 8, the push rod 12 of push rod bearing pin 10 empty covers is connected with plunger 6a, 6b.Planetary pinion 8 is 1: 2 with internal gear 7 gear ratios of fixing.Between rotating sleeve 3 and pressure hydraulic fluid port P ', be provided with accumulator 9.Said hydraulic oil distribution system is made up of coaxial rotating sleeve of adorning 3 and fixed cover 2 on the transmission shaft 1, is provided with oil-collecting hole and is communicated with oil circuit on fixed cover 2.The oil circuit b of correspondence when the plunger oil suction
1, b
2O ' communicates with inlet port, the oil circuit b of correspondence when plunger is pressed oil
1, b
2Communicate with pressing hydraulic fluid port P '.
During work, transmission shaft 1 rotates under motor driving, the internal gear 7 of epicyclic train maintains static, make plunger 6a by epicyclic train, 6b can be at plunger case 4a, do straight reciprocating motion among the 4b, planetary tie-rod drives by driving input shaft 1, planetary pinion 8 skies are enclosed within on the bearing pin 11 of transmission shaft 1 extended tie-rod 13, planetary pinion 8 is 1: 2 with the gear ratio of internal gear 7, when transmission shaft 1 drives bearing pin 11 rotations of tie-rod 13, make plunger 6a by planetary pinion 8,6b is at plunger case 4a, do straight reciprocating motion among the 4b, inhale and press the oil action; Join oil system and form, be used for the oil circuit b of correspondence when the plunger oil suction by coaxial rotating sleeve of adorning 2 and fixed cover 3 on the driving input shaft 1
1, b
2O ' communicates with inlet port, the oil circuit b of correspondence when plunger is pressed oil
1, b
2Communicate with pressing hydraulic fluid port P '.The two-bit triplet solenoid valve 5 of serial connection
a, 5
bRealize off-load and unload stream, valve 5
a, 5
bDuring dead electricity, make each the oil circuit a on the plunger case
1, a
2Correspondence and oil circuit b
1, b
2Communicate, when valve 5
a, 5
bWhen electric, corresponding plunger case oil circuit is communicated with inlet port O ', by logic control a two-bit triplet solenoid valve is got when electric, the output discharge capacity reduces 1/2nd, when make two two-bit triplet solenoid valves all when electric, the output discharge capacity is zero, keeps delivery pressure and fuel feeding by accumulator 9.
See Fig. 2, two plunger hydraulic variable displacement motors, identical with above-mentioned hydraulic variable pump with double plunger structure, change above-described inlet port O ' into oil drain out, press hydraulic fluid port P ' to change the pressure oil inlet opening into.Under the pressure oil effect, making plunger 6a, the 6b straight reciprocating motion in plunger case 4a, 4b promote planetary pinion 8 revolves round the sun in internal gear 7, this revolution motion has been realized the rotation of planetary pinion tie-rod 13, planetary tie-rod 13 drives take-off (propeller) shaft 1 rotation, the two-bit triplet solenoid valve 5 of serial connection
a, 5
bRealize off-load and unload stream, valve 5
a, 5
bDuring dead electricity, make each the oil circuit a on the plunger case
1, a
2Correspondence and oil circuit b
1, b
2Communicate, when valve 5
a, 5
bWhen electric; corresponding plunger case oil circuit is communicated with oil drain out O '; then corresponding oil cylinder unloads stream, by logic control a two-bit triplet solenoid valve is got when electric, and the input discharge capacity reduces 1/2nd; output speed becomes 2 times; when make two two-bit triplet solenoid valves all when electric, the input discharge capacity is zero, motor shutdown; accumulator 9 in the oil circuit is used to reduce pressure pulsation, stablizes the motor output speed.
See Fig. 3, the principle schematic that a bit (the push rod bearing pin) on the planetary pinion does reciprocating linear motion.
Realize that by epicyclic train rotation becomes the argument reasoning of straight reciprocating motion conversion: according to condition, the tooth number Z of planetary pinion 8
1Tooth number Z with internal gear 7
2Ratio is Z
1: Z
2=1: 2, beginning two gears is some O on the planet pitch circle in the H point gearing
3(push rod bearing pin 10).When tie-rod 13 turned over a angle, contact points moved to N from H, and corresponding pure rolling arc length is respectively S
HNWith S
O3N, and S
HN=S
O3N, by the gear ratio relation as can be known, S
O3NCorresponding central angle b=2*a makes the angular bisector MO of angle b
2With make HO
1Vertical line PO
2, O is then arranged
3N=2MN, Δ O
1O
2P and Δ O
2NM congruence, i.e. O
3N=PO
2+ MN.Explanation thus, O
3Point is at HO
1Straight line on.
When tie-rod 13 around O
1One week, some O
3(push rod bearing pin 10) is at the diameter HH of internal gear 7
1Linear reciprocating motion of last work promptly drives plunger 6a, 6b and make one time linear reciprocating motion in plunger case 4a, 4b.
Claims (7)
1. hydraulic variable pump with double plunger and motor include plunger (6a, 6b) and plunger case (4a, 4b), and said hydraulic oil distribution system is characterized in that also including between plunger (6a, 6b) and is connected with linear reciprocating motion mechanism; The oil circuit of plunger case (4a, 4b) is provided with the two-position three-way valve hydraulic system.
2. hydraulic variable pump with double plunger as claimed in claim 1 and motor is characterized in that described two-position three-way valve hydraulic system includes on the oil circuit of plunger case (4a, 4b) to be serially connected with two-bit triplet solenoid valve (5
a, 5
b); Valve (5
a, 5
b) during dead electricity, the oil circuit (a on the plunger case (4a, 4b)
1, a
2) corresponding and oil circuit (b
1, b
2) be communicated with; When valve (5
a, 5
b) when electric, the oil circuit (a on the then corresponding plunger case (4a, 4b)
1, a
2) communicate with inlet port (O ').
3. hydraulic variable pump with double plunger as claimed in claim 1 or 2 and motor, it is characterized in that described linear reciprocating motion mechanism comprises that transmission shaft (1) is connected with the turning axle (11) of epicyclic train tie-rod (13), turning axle (11) is set with planetary pinion (8), planetary pinion (8) and fixing internal gear (7) engagement, be provided with push rod bearing pin (10) on the end face of planetary pinion (8), the push rod (12) of the empty cover of push rod bearing pin (10) is connected with plunger (6a, 6b).
4. hydraulic variable pump with double plunger as claimed in claim 3 and motor is characterized in that described epicyclic train, and planetary pinion (8) is 1: 2 with internal gear (7) gear ratio of fixing.
5. hydraulic variable pump with double plunger as claimed in claim 4 and motor is characterized in that described at fixed cover (3) and press between the hydraulic fluid port (P ') and be provided with accumulator (9).
6. hydraulic variable pump with double plunger as claimed in claim 5 and motor is characterized in that described said hydraulic oil distribution system is made up of transmission shaft (1) last coaxial rotating sleeve of adorning (2) and fixed cover (3), be provided with oil-collecting hole and be communicated with oil circuit on fixed cover (3); Oil circuit (the b of correspondence when the plunger oil suction
1, b
2) communicate the oil circuit (b of correspondence when plunger is pressed oil with inlet port (O ')
1, b
2) communicate with pressing hydraulic fluid port (P ').
7. hydraulic variable pump with double plunger as claimed in claim 1 and motor is characterized in that described inlet port (O ') can change oil drain out into, press hydraulic fluid port (P ') can change the pressure oil inlet opening into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410073104 CN1746517A (en) | 2004-09-09 | 2004-09-09 | Hydraulic variable pump with double plunger and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410073104 CN1746517A (en) | 2004-09-09 | 2004-09-09 | Hydraulic variable pump with double plunger and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1746517A true CN1746517A (en) | 2006-03-15 |
Family
ID=36166179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410073104 Pending CN1746517A (en) | 2004-09-09 | 2004-09-09 | Hydraulic variable pump with double plunger and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1746517A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281877A (en) * | 2018-12-12 | 2019-01-29 | 燕山大学 | A kind of high pressure accumulator and its control method |
-
2004
- 2004-09-09 CN CN 200410073104 patent/CN1746517A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281877A (en) * | 2018-12-12 | 2019-01-29 | 燕山大学 | A kind of high pressure accumulator and its control method |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |