CN201013546Y - Piston pump drive device - Google Patents
Piston pump drive device Download PDFInfo
- Publication number
- CN201013546Y CN201013546Y CNU2007200187899U CN200720018789U CN201013546Y CN 201013546 Y CN201013546 Y CN 201013546Y CN U2007200187899 U CNU2007200187899 U CN U2007200187899U CN 200720018789 U CN200720018789 U CN 200720018789U CN 201013546 Y CN201013546 Y CN 201013546Y
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- 239000007788 liquid Substances 0.000 abstract description 32
- 230000008859 change Effects 0.000 abstract description 4
- 238000012886 linear function Methods 0.000 abstract description 2
- 238000001595 flow curve Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 3
- 238000007792 addition Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a piston pump drive arrangement, drive arrangement is a cylinder, be equipped with the curve groove on the side of cylinder, the curve in curve groove is formed by following two quadratic curve equation combinations: y is1＝k(x－a/4)2－A (0≤x≤a/2)；y2＝－k(x－3a/4)2＋A (a/2≤x≤a)；A＝ka216; wherein: k is a positive number; a is the perimeter of the bottom surface of the cylinder; y is1A first curve equation; y is2A second curve equation. When the cylinder rotates at a constant speed, the end of the piston rod of the piston pump slides along the curved groove in the vertical direction, the moving speed of the piston is a linear function of time t, and then the output liquid flow is constant through the combination of 4n (n is a natural number) piston pumps. As the drive arrangement of piston pump, the utility model discloses simple structure to single piston pump output liquid flow is continuous function, does not have the step change problem, and the price/performance ratio improves.
Description
Technical Field
The utility model relates to a hydraulic power system's technical field in the machinery, specific theory is a piston pump drive arrangement of novel structure.
Background
Most of the existing hydraulic pumps or liquid conveying equipment can not enable the liquid output (or input) flow rate G = c (c is a constant), although the existing rotary piston pumps can solve the problem, the structure is complex, a plurality of movable components are provided, a pair of pistons which alternately do work have step change from G to c, and the pressure-bearing boundary of the device is tested by pressure step response.
The utility model discloses consider the step change problem of solving liquid output or input flow from the aspect of piston pump actuating mechanism, use comparatively simple method and less spare part, reach the effect that G = c (c is the constant).
SUMMERY OF THE UTILITY MODEL
The utility model provides a piston pump driving device for solving the problem of constant output liquid flow of the piston pump.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
a driving device of a piston pump is a cylinder, and a curve groove is formed in the side face of the cylinder.
The curve of the curve groove is formed by combining the following two quadratic curve equations:
A＝ka 2 /16；
wherein: a is the perimeter of the bottom surface of the cylinder; kappa is a positive number; y is 1 A first curve equation; y is 2 A second curve equation.
In order to facilitate the connection of piston rods of the piston pump to the driving device, sliding blocks are arranged in the curved grooves, and one sliding block is installed on one piston rod. This slider is a cylinder, and its size is far less than the utility model discloses piston pump drive arrangement cylinder size, highly be greater than the degree of depth in curve groove, bottom surface diameter and the curve groove width equal, one end is installed on the piston rod, and the other end inserts in the curve inslot, can slide in the curve inslot, and its axis intersects perpendicularly in the axis of cylinder, the axis of slider with the orbit of cylinder side intersection is the curve that the curve equation described promptly.
Compared with the prior art, the utility model discloses an advantage is with positive effect:
the utility model discloses piston pump drive arrangement is a cylinder that opens on the side has the curve groove, and when the cylinder was rotatory with constant speed, the piston rod end portion of piston pump made the vertical direction along the curve groove and slided, and the velocity of motion of piston is the linear function of time t, then through the combination of 4n (n is the natural number) piston pumps for the liquid flow of output is the constant value. As the driving device of the piston pump, the utility model discloses simple structure to single piston pump output liquid flow is continuous function, does not have the step change problem, and the price/performance ratio improves.
Drawings
Fig. 1 is a schematic structural view of a piston pump driving device according to the present invention;
fig. 2 is a schematic side view of the piston pump driving device at time t =0 according to the present invention;
fig. 3 is a side development view of the piston pump driving device of the present invention when the piston pump is connected at time t = 0;
fig. 4 is a three-dimensional usage state diagram of the piston pump driving device of the present invention when the piston pump is connected at the time t = 0;
fig. 5 is a plan view of the piston pump driving device according to the present invention when the piston pump is connected;
FIG. 6 is a schematic view of the flow curve of the piston pump 4-1 of the piston pump driving device of the present invention;
FIG. 7 is a schematic view of the flow curve of the piston pump 4-2 of the piston pump driving device of the present invention;
FIG. 8 is a schematic view of the flow curve of the piston pump 4-3 of the piston pump driving device of the present invention;
FIG. 9 is a schematic view of the flow curve of the piston pump 4-4 of the piston pump driving device of the present invention;
fig. 10 is a schematic view of the total flow curve of the piston pump drive of the present invention;
fig. 11 is a side view of another piston pump connection mode of the piston pump driving device according to the present invention at time t = 0;
wherein: 1, a cylinder; 2, a curved groove; 3, a sliding block; 3-1, 3-2, 3-3 and 3-4 sliding blocks; 4 a piston pump; 4-1 piston pump; 4-2 piston pumps; 4-3 piston pumps; 4-4 piston pumps; 5, a piston; 6 a piston rod; 6-1 piston rod fixing sleeve; 7, an output oil tank; 8, inputting an oil tank; 9 a check valve; 10 pipelines; 11 flow curve of the piston pump 4-1; 12 flow curve of the piston pump 4-2; 13 flow curve of piston pump 4-3; 14. the flow curve of the piston pump 4-4; 15 total input flow curve; 16 total output flow curve;
omega is the rotation angular velocity of the cylinder, r is the radius of the bottom surface of the cylinder, a is the perimeter of the bottom surface of the cylinder, t is any time, the height of the cylinder is slightly larger than 2A, and S is the area of the piston.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Embodiment one, the utility model discloses piston pump drive arrangement is a cylinder 1 that the side was opened has curved groove 2, and the curvilinear equation is
a is the perimeter of the bottom surface of the cylinder, and k is a positive number.
8 points are selected on the curve, and the coordinates are as follows: where ω is the rotation angular velocity of the cylinder 1, r is the radius of the bottom surface of the cylinder 1, a is the circumference of the bottom surface of the cylinder 1, t is the arbitrary time, the cylinder height is 2A, and S is the area of the piston 5.
Fixed point: (1) (0, 0), (2) < 2 >
-A)，③(
0)，④(
A) (ii) a And (3) moving point: e (ω rt, y) E )，
y 1 From setpoint (1) (0, 0) to setpoint (2) ((
-A) to a setpoint (3) ((1)
0) Equation of the curve of (a), y 2 From a fixed point (3) <
0) To a fixed point (4) <A) A curve equation to the fixed point (1) (0, 0); the coordinates of the sliding blocks 3-1, 3-2, 3-3 and 3-4 on the curve groove respectively correspond to the moving points E, F, M and N.
The first use method is as follows:
four piston pumps 4-1, 4-2, 4-3 and 4-4 are arranged in the vertical and horizontal directions, the types and the horizontal positions of the four piston pumps are the same, the piston positions at the initial moment are sequentially different by a quarter period, the upper ends of piston rods of the four piston pumps are respectively fixed on four points E, F, M and N which are spaced by the quarter period, the top view of the four piston pumps is shown in figure 5, a large circle is a cylinder 1, four small circles are respectively the piston pumps 4-1, 4-2, 4-3 and 4-4, the liquid is discharged when the piston moves downwards, the liquid is sucked when the piston moves upwards, the suction flow is a positive value, and the discharge flow is a negative value.
The set-up coordinate system is shown in figure 2.
Wherein:
A＝ka 2 /16
a is the perimeter of the bottom surface of the cylinder; κ is a positive number; y is 1 The curve equation for the fixed points (1) - (2) - (3), y 2 Is a curve equation from fixed points (3) - (4) - (1).
Let the volume equation of the liquid dischargeable liquid in each piston pump V (t) = (A + y) · S,
for point E, the dynamic coordinates (ω rt, y) of point E are determined E ) Substituting the volume equation V (t) = (a + y) · S, we obtain:
the flow equation is then:
the flow rate of the piston pump 4-1 is obtained
The curve of (a) is shown in fig. 6.
In the same way, the points are pointed
Respectively, into the volume equation V (t) = (a + y) · S, to obtain:
flow rate of piston pump 4-2
As shown in figure 7, the curve of (c),
flow rate of piston pump 4-3
As shown in figure 8, the curve of (c),
flow rate of piston pump 4-4
The curve of (a) is shown in fig. 9.
The input flows of the four piston pumps are combined, and the output flows are combined to obtain the total flow
As shown in fig. 10, it can be seen that the total output flow rate is equal to the total input flow rate and is a constant value
The total flow of liquid drawn or discharged by the system is constant at any time t.
In order to facilitate the connection of the piston rod of the piston pump to the driving device, a sliding block is arranged in the curve groove. The number of the corresponding connecting piston rods and the number of the installing slide blocks. The slider is an approximate cylinder, the height of the slider is greater than the depth of the curve groove, the slider can slide in the groove, the axis of the slider is perpendicular to the axis of the cylinder, and the track of the intersection point of the axis of the slider and the lateral surface of the cylinder is a curve described by a curve equation.
The specific movement process is as follows:
at time t =0, the pump states are as shown in fig. 4, the piston pumps 4-1, 4-2, 4-3, 4-4, the corresponding sliders are 3-1, 3-2, 3-3, 3-4, respectively, and the corresponding points E, F, M, N of the sliders are located at points (1) (0, 0), (2), (3), 3, 4, respectively
-A)，③(
0)，④(
A) (ii) a When the piston pump driving device of the utility model rotates at the angular velocity omega in the direction shown in figure 4,
1. at the time t =0, the coordinates E, F, M, N corresponding to the sliders 3-1, 3-2, 3-3, 3-4 are respectively located at the points (1), (2), (3), (4)
The slide block 3-1 (point E) moves to the point (2) to drive the piston rod 6 to move downwards, and the pump 4-1 discharges liquid;
the sliding block 3-2 (point F) moves to the point (3) to drive the piston rod 6 to move upwards, and the pump 4-2 sucks liquid;
the sliding block 3-3 (point M) moves to point (4) to drive the piston rod 6 to move upwards, and the pump 4-3 sucks liquid;
the sliding block 3-4 (point N) moves to the point (1) to drive the piston rod 6 to move downwards, and the pump 4-4 discharges liquid;
2、
at the moment, when the sliding blocks 3-1 (point E), 3-2 (point F), 3-3 (point M) and 3-4 (point N) move to the points (2), (3), (4) and (1) respectively,
the sliding block 3-1 (point E) moves to the point (3) to drive the piston rod 6 to move upwards, and the pump 4-1 sucks liquid;
the sliding block 3-2 (point F) moves to point (4) to drive the piston rod 6 to move upwards, and the pump 4-2 sucks liquid;
the sliding block 3-3 (point M) moves to the point (1) to drive the piston rod 6 to move downwards, and the pump 4-3 discharges liquid;
the sliding block 3-4 (N points) moves to the point (2) to drive the piston rod 6 to move downwards, and the pump 4-4 discharges liquid;
3、
at the moment, when the sliding blocks 3-1 (point E), 3-2 (point F), 3-3 (point M) and 3-4 (point N) move to the points (3), (4), (1) and (2) respectively,
the sliding block 3-1 (point E) moves to the point (4) to drive the piston rod 6 to move upwards, and the pump 4-1 sucks liquid;
the sliding block 3-2 (point F) moves to the point (1) to drive the piston rod 6 to move downwards, and the pump 4-2 discharges liquid;
the sliding block 3-3 (point M) moves to the point (2) to drive the piston rod 6 to move downwards, and the pump 4-3 discharges liquid;
the sliding block 3-4 (point N) moves to point (3) to drive the piston rod 6 to move upwards, and the pump 4-4 sucks liquid;
4、
at the moment, when the sliding block 3-1 (point E), 3-2 (point F), 3-3 (point M) and 3-4 (point N) respectively move to the points (4), (1), (2) and (3),
the sliding block 3-1 (point E) moves to the point (1) to drive the piston rod 6 to move downwards, and the pump 4-1 discharges liquid;
the sliding block 3-2 (point F) moves to the point (2) to drive the piston rod 6 to move downwards, and the pump 4-2 discharges liquid;
the sliding block 3-3 (point M) moves to the point (3) to drive the piston rod 6 to move upwards, and the pump 4-3 sucks liquid;
the sliding block 3-4 (point N) moves to the point (4) to drive the piston rod 6 to move upwards, and the pump 4-4 sucks liquid.
5、
At the moment, the sliding blocks 3-1 (point E), 3-2 (point F), 3-3 (point M) and 3-4 (point N) move to the points (1), (2), (3) and (4) respectively,
the output oil tank 7 is always in a liquid discharge state along the pipeline 10 by the check valve 9, and the input oil tank 8 is always in a liquid suction state by the check valve 9. Thus, a cycle process is completed, and a liquid suction and discharge process of a period is completed.
The second use mode:
as shown in fig. 11, the piston pump 4-1 and the piston pump 4-3 share a slider, the piston pump 4-2 and the piston pump 4-4 share a slider, and t =0, point E is located at (1) (0, 0), and point F is located at (2) (0, 0)And, -at point a), the pump piston rods are perpendicular to the x-axis, and the positions of the pistons differ by a quarter of a cycle. Others are the same asThe first usage method is.
In addition, the curved groove formed on the side surface of the cylinder of the utility model can be more than one period, and the number of the piston pumps can be 8 or 4n (n is a natural number). The horizontal position of each pump can be different, but 4 pumps are required to be arranged in a group, and the slide block and the piston position of each group of piston pumps are required to be sequentially different by 1/4 period.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.
Claims (2)
1. A piston pump drive device characterized by: the driving device is a cylinder, and a curve groove is formed in the side face of the cylinder.
2. The piston pump driving device according to claim 1, wherein: the curve of the curve groove is formed by combining the following two quadratic curve equations:
A＝ka 2 /16
wherein: κ is a positive number; a is the circumference of the bottom surface of the cylinder; y is 1 A first curve equation; y is 2 A second curve equation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200187899U CN201013546Y (en) | 2007-02-14 | 2007-02-14 | Piston pump drive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200187899U CN201013546Y (en) | 2007-02-14 | 2007-02-14 | Piston pump drive device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201013546Y true CN201013546Y (en) | 2008-01-30 |
Family
ID=39025332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200187899U Expired - Fee Related CN201013546Y (en) | 2007-02-14 | 2007-02-14 | Piston pump drive device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201013546Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100447411C (en) * | 2007-02-14 | 2008-12-31 | 陶磊 | Piston pump drive device |
| CN108946637A (en) * | 2018-09-25 | 2018-12-07 | 深圳超磁机器人科技有限公司 | A kind of bottleneck dispenser |
-
2007
- 2007-02-14 CN CNU2007200187899U patent/CN201013546Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100447411C (en) * | 2007-02-14 | 2008-12-31 | 陶磊 | Piston pump drive device |
| CN108946637A (en) * | 2018-09-25 | 2018-12-07 | 深圳超磁机器人科技有限公司 | A kind of bottleneck dispenser |
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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: 20080130 Termination date: 20100214 |