CN202001233U - Cam driving mechanism for multi-cylinder reciprocating pump - Google Patents
Cam driving mechanism for multi-cylinder reciprocating pump Download PDFInfo
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- CN202001233U CN202001233U CN2010202340077U CN201020234007U CN202001233U CN 202001233 U CN202001233 U CN 202001233U CN 2010202340077 U CN2010202340077 U CN 2010202340077U CN 201020234007 U CN201020234007 U CN 201020234007U CN 202001233 U CN202001233 U CN 202001233U
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- cam
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Abstract
The utility model discloses a cam driving mechanism for a multi-cylinder reciprocating pump, and aims to provide a multi-cylinder reciprocating pump driving mechanism which is low in flow pulsation, high in efficiency, small in size and light in weight. The cam driving mechanism comprises a cam and reciprocating components, wherein each reciprocating component consists of a roller, a roller shaft, a roller frame and a connecting rod. The equation of the curve height of the cam to any polar angle is z=H (1-cos (phi))/2; the normally selected number of the reciprocating components is 7 or 9; each roller only has the freedom degree of rotating around the axis of the roller relative to the corresponding roller frame; one end of each connecting rod is rigidly connected onto the corresponding roller shaft; the other end of each connecting rod is connected with a piston; a supplemental restraint mechanism ensures the centers of all the connecting rods to be evenly distributed on a periphery with the axis of the cam as a center, enables each component to only have the freedom degree of moving along the direction parallel to the axis of the cam, and ensures the axis of each roller to constantly penetrate through the axis of the cam; and a supplemental return mechanism ensures the rollers corresponding to the piston in suction to constantly keep contacting with the surface of the cam.
Description
Technical field
The utility model relates to a kind of reciprocating pump, particularly a kind of cam drive mechanism that is used for multi cylinderpump.
Background technique
Reciprocating pump is because its high efficient and application fields are subjected to people's attention always.
In the high-pressure liquid medium transportation art, conventional valve change of current triplex pump has obtained extensive use.And that the subject matter that this pump exists is pulsation is big, designs at the document reciprocating pump that to provide for the connecting rod of widespread usage in the book be about 25% than the theory pulsation of the triplex pump under the numerical value.Though can an accumulator is installed reduce pulsation by the place of advancing, arrange mouthful at pump, the characteristics of motion that suitably increases the quantity of cylinder and appropriate design piston with realize pulsation to reduce be better solution.
At U.S. Patent Publication No. US 7004121 B2, open day on February 28th, 2006, name is called the piston of piston machine and arranges and controlling method, a kind of theoretical cam curve of cam-actuated 6 cylinder piston machines is disclosed, 6 cams move having on the cam of this curve, can guarantee that the theoretical delivery pulsation of intake line and discharge conduit is zero.But in the application of reality, consider that roller must be submissive in the transformation of upper and lower stop place moving direction, impact can not be arranged, and roller must have certain diameter, therefore this cam curve must carry out slyness at the curve that piston starts and stop the position, thereby make that the design of this cam curve is comparatively complicated, and the 6 cylinder pumps pulsation that drives according to the final actual cam curve that obtains can not zero.
The theory pulsation of traditional circumference swash plate driving multi cylinderpump is very little, designing the theory pulsation that provides 7 cylinder pumps in the book at the document cam-type axial piston pump is 2.53%, 9 cylinder pumps are 1.53%, the change of current of considering reciprocating pump must cause flow pulsation, consider that from application of engineering project such theory pulsation is comparatively desirable.But the reciprocating pump that swash plate drives generally is used for the Hydraulic pump of small flow, high pressure, the thrust plate change of current, in the transfer pump or slurry pump of big flow, high pressure, because piston shoes can not be introduced by the hydraulic oil that will arrange mouth and produce the static pressure support, therefore, the frictional loss of piston shoes and swash plate is bigger.
Thereby it is an effective scheme that solves the reciprocating pump pulsation problem that the cam curve that adopts multi-cylinder configuration and appropriate design processing significantly reduces flow pulsation.
The model utility content
The purpose of this utility model provides a kind of cam drive mechanism that is used for multi cylinderpump, thereby overcomes the defective of prior art, improves reciprocal pump performance effectively.
In order to achieve the above object, the utility model is achieved through the following technical solutions: this mechanism comprises cam, the to-and-fro motion assembly of being made up of roller, roller shaft, turning rolls, connecting rod.
Described cam curved surface is a continuous curve surface around camshaft line, and the intersection on this curved surface and arbitrary plane of crossing camshaft line is a straight line perpendicular to camshaft line; With the camshaft line is the z axle, with the bobbin that vertically passes the z axle and cross the cam minimum point is the x axle, passing the z axle and to be the y axle perpendicular to the bobbin on the plane of forming by z axle and x axle, with x,, the z axle serves as that the basis constitutes cartesian coordinate system and cylndrical surface system of coordinates, then for arbitrary polar angle
Under the cam curved surface height be
Wherein H is that cam curved surface is in the axial maximum height of z; The to-and-fro motion component count of being made up of roller, roller shaft, turning rolls, connecting rod is for greater than 3 odd number, and often selecting number is 7 or 9; Roller is fixed on the turning rolls by roller shaft, and roller only has degrees of freedom around self rotational with respect to turning rolls; Connecting rod one end is rigidly connected on the roller shaft, and the other end links to each other with piston, and connecting rod axis vertical wheel axis also passes through the roller center.
Auxiliary constraint mechanism guarantees that it is on the circumference at center that each connecting rod center is evenly distributed on the camshaft line, and auxiliary constraint mechanism makes each assembly only have the degrees of freedom that edge and camshaft line parallel direction move and the axis that guarantees each roller passes camshaft line all the time; Auxiliary backhaul mechanism guarantees to be in the pairing roller of piston of inhaling journey and keeps in touch with cam face all the time.Because adopt technique scheme, the beneficial effects of the utility model are: (1) makes liquid medium carry the pulsation with reciprocating pump to reduce greatly; (2) cam curve is simple, is convenient to processing; (3) and traditional triplex pump relatively, adopt the pump of this device to have compact structure, the pump efficiency height, volume is little, lightweight advantage.
Description of drawings
Fig. 1: camshaft side figure;
Fig. 2: cam drive mechanism plan view;
The left view of Fig. 3: Fig. 2;
Among the figure: cam 1 roller 2 turning rollss 3 connecting rods 4 roller shafts 5 cam curved surfaces 6
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
In Fig. 1, the cam curved surface 6 of cam 1 adds man-hour according to described function, and the curved surface radial length should be greater than the width of turning rolls.
Among Fig. 2, roller 2 is fixed on the turning rolls 3 by roller shaft 5, and connecting rod 4 and turning rolls 3 for example can or be threaded by welding for being rigidly connected.
When cam rotation promotes roller, except giving the axial force of roller with needs, also pair roller has applied the power of the substantially horizontal that is parallel to the xy plane, this power makes the to-and-fro motion assembly that the horizontal motion tendency be arranged, therefore, by auxiliary constraint mechanism this assembly is carried out kinematic constraint and have the straight line motion degrees of freedom that is parallel to camshaft line to guarantee it.
When piston was in the suction journey, auxiliary backhaul mechanism applied a power of pointing to the cam curved surface direction to the to-and-fro motion assembly, makes roller and cam curved surface be in contact condition all the time, thereby guaranteed the correct characteristics of motion of piston.
The instantaneous theoretical delivery of each piston is
Wherein, d is a piston diameter, and v is a velocity of piston, will be in the instantaneous flow addition of the piston of scheduling, just equals the instantaneous flow of the discharge tube of pump; To be in the instantaneous flow addition of the piston of inhaling journey, just equal the instantaneous flow of the suction pipe of pump, work as use
The time, for 7 cylinder pumps, pulsation rate equals 2.53, for 9 cylinder pumps, equals 1.53.
When cam drove around self rotational by motor or motor, each to-and-fro motion assembly moved reciprocatingly by means of auxiliary constraint mechanism and auxiliary backhaul mechanism, does alternate reciprocating motion thereby drive each piston, has realized the work of the motion of pump.
Claims (4)
1. cam drive mechanism that is used for multi cylinderpump, it comprises: cam, the to-and-fro motion assembly of being made up of roller, roller shaft, turning rolls, connecting rod; It is characterized in that cam curved surface is a continuous curve surface around camshaft line, and the intersection on this curved surface and arbitrary plane of crossing camshaft line is a straight line perpendicular to camshaft line.
2. a kind of cam drive mechanism that is used for multi cylinderpump according to claim 1 is characterized in that, the to-and-fro motion component count of being made up of roller, roller shaft, turning rolls, connecting rod is for greater than 3 odd number.
3. a kind of cam drive mechanism that is used for multi cylinderpump according to claim 1 is characterized in that roller is fixed on the turning rolls by roller shaft, and roller only has degrees of freedom around self rotational with respect to turning rolls.
4. a kind of cam drive mechanism that is used for multi cylinderpump according to claim 1 is characterized in that connecting rod one end is rigidly connected on the roller shaft, and the other end links to each other with piston, and connecting rod axis vertical wheel axis also passes through the roller center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202340077U CN202001233U (en) | 2010-06-23 | 2010-06-23 | Cam driving mechanism for multi-cylinder reciprocating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202340077U CN202001233U (en) | 2010-06-23 | 2010-06-23 | Cam driving mechanism for multi-cylinder reciprocating pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202001233U true CN202001233U (en) | 2011-10-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202340077U Expired - Fee Related CN202001233U (en) | 2010-06-23 | 2010-06-23 | Cam driving mechanism for multi-cylinder reciprocating pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN202001233U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443347A (en) * | 2015-12-31 | 2016-03-30 | 四川奥博生物医学电子有限公司 | High-pressure pump improved structure |
| CN107228062A (en) * | 2017-08-03 | 2017-10-03 | 鲍满腔 | A kind of cam drive mechanism and twin-tub wind press system |
| CN110566426A (en) * | 2019-10-21 | 2019-12-13 | 安徽理工大学 | Double-acting groove cam constant-flow reciprocating pump |
| CN111734699A (en) * | 2020-07-09 | 2020-10-02 | 四川航天烽火伺服控制技术有限公司 | Electric hydrostatic actuator |
-
2010
- 2010-06-23 CN CN2010202340077U patent/CN202001233U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443347A (en) * | 2015-12-31 | 2016-03-30 | 四川奥博生物医学电子有限公司 | High-pressure pump improved structure |
| CN107228062A (en) * | 2017-08-03 | 2017-10-03 | 鲍满腔 | A kind of cam drive mechanism and twin-tub wind press system |
| CN107228062B (en) * | 2017-08-03 | 2020-05-19 | 鲍满腔 | Cam driving mechanism and double-cylinder air compressor system |
| CN110566426A (en) * | 2019-10-21 | 2019-12-13 | 安徽理工大学 | Double-acting groove cam constant-flow reciprocating pump |
| CN111734699A (en) * | 2020-07-09 | 2020-10-02 | 四川航天烽火伺服控制技术有限公司 | Electric hydrostatic actuator |
| CN111734699B (en) * | 2020-07-09 | 2022-08-16 | 四川航天烽火伺服控制技术有限公司 | Electric hydrostatic actuator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING ZHONGHE TIANWAN PUMP INDUSTRY CO., LTD. Free format text: FORMER OWNER: DALIAN ZHIXIN SCIENCE AND TECHNOLOGY CO., LTD. Effective date: 20111117 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 116001 DALIAN, LIAONING PROVINCE TO: 100045 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20111117 Address after: 100045, Beijing, Xicheng District, Three Mile 1 District, No. three, building No. two first floor Patentee after: Beijing Zhonghe Tianwan Pump Industry Co., Ltd. Address before: 116001 No. 67, Binhai East Road, Zhongshan District, Liaoning, Dalian 20-2 Patentee before: Dalian Zhixin Technology Co., Ltd. |
|
| DD01 | Delivery of document by public notice |
Addressee: Beijing Zhonghe Tianwan Pump Industry Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| DD01 | Delivery of document by public notice | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20190623 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |