CN85101715A - Radial plunger type oil pump or oil motor that shell rotates - Google Patents
Radial plunger type oil pump or oil motor that shell rotates Download PDFInfo
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- CN85101715A CN85101715A CN 85101715 CN85101715A CN85101715A CN 85101715 A CN85101715 A CN 85101715A CN 85101715 CN85101715 CN 85101715 CN 85101715 A CN85101715 A CN 85101715A CN 85101715 A CN85101715 A CN 85101715A
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Abstract
The present invention is radial plunger type oil pump or the oil motor that a kind of shell rotates, its total efficiency can reach 95%, mechanical efficiency can reach 97%, 0～1000 rev/min of speed range (short-term can reach 1500～2000 rev/mins), its volume is little, in light weight, (quantitative have only five kinds of major parts) simple in structure, be easy to make, material there is not specific (special) requirements, require general to the oil plant that uses, insensitive to environmental factor, intense impact that the ground injustice causes in the time of bearing vehicle driving and vibration, can be loaded on direct driving wheel in the wheel easily, transmission system is simplified, made things convenient for vehicle to arrange and the realization stepless change, be particularly suitable for doing the drive unit of various vehicles.
Description
The prior art situation
The hydrostatic transmissions system has a lot of advantages, has obtained increasingly extensive application in recent years.But, because the performance index of its critical piece (oil pump and oil motor) are desirable not enough, make its application area be subjected to very big restriction, particularly its gap of drive system to various middle and high fast vehicles is bigger, and subject matter is:
One, efficient lower, efficiently distinguish narrowly, this is a key of success problem to classes such as the automobile lower vehicle of Rate of load condensate commonly used.
Two, speed range is too narrow, can not be used for direct driving wheel.For example axial piston oil pump, oil motor relatively are suitable for working under the rotating speed more than 1000 rev/mins, and low-speed big type oil motor generally is suitable for working below 200～300 rev/mins, if make it in 0～1000 rev/min scope, to work, the former should add a retarder latter then need add a speed increaser, thereby complex structure, heaviness, cost are significantly increased, and the advantage of static pressure transmission also just therefore is cancelled.For most automobiles, its vehicle wheel rotational speed is between 0～1000 rev/min (the corresponding speed of a motor vehicle is approximately 0～140 kilometer/hour) greatly, and therefore, the wheel oil motor of the direct driving wheel of all uncomfortable cooperation of existing various types of oil motors at present uses.
Three, existing several efficient is than higher oil motor (axial piston, inner curve multiaction formula), and its structure is all very complicated, part is many in addition, technological requirement is high, expensive narrow its application area that makes of speed range of adding of price has been subjected to very big restriction.
Four, the oil pump of existing various better performances and oil motor are all responsive to environmental factor, its input and output shaft can not bear adds radially or axial force, will keep higher installation precision, the mode of action of externally carrying and oil, filtering precision etc. that strict requirement is all arranged for stipulating of for example having, this just makes its applying on vehicle be restricted.
Five, for multiple vehicle, automobile particularly, its desirable static pressure transmission scheme is the transmission of wheel motor formula static pressure, promptly oil motor is loaded on and comes direct driving wheel in the wheel, replaced mechanically operated clutch, speed changer, transmission shaft, back axle (till wheel hub) commonly used with oil pump, oil motor system.This scheme can make that transmission system is greatly simplified, the car load General Layout Design is very convenient and some performances significantly improve.The oil motor that satisfies this operating conditions must have higher integrated performance index, and existing oil motor structure all can not satisfy this requirement comprehensively.
Purpose of the present invention just is to solve above several problems.
Summary of the invention
In order synthetically to solve the problem that proposes above, the present invention has mainly taked following measures:
One, when other part of design power transmission, effectively utilizes the hydrostatic support principle its stressed surface is in the supporting of pressure oil, thereby alleviated parts, so also just obtained high mechanical efficiency and starting torque efficient because of the frictional loss that direct power transmission causes.
Two, for oil pump and oil motor can be worked in the velocity range of broad, the present invention serves as that the improvement of speed up is carried out to its structure in the basis with low-speed big class motor configuration, makes it the advantage that not only has the advantage of low-speed big torque motor but also have high speed.The problem of equilibrium problem, the various liquid flowing loss of minimizing and mechanical friction loss and PV value (product of pressure and relative velocity) when when each other part of design, all having considered high speed etc.
Three, enable to develop into stepless variable, so that further enlarge its speed adjustable range.
Four, make it to have stronger suction capacity,, can cancel the repairing oil circuit, the structure of system is further simplified so that when it is used for some hydraulic system.
Five, the present invention adopted that axle is fixing, axle journal flow and shell scheme of rotation, this scheme can be saved the flow cover and wait other part, thereby reduced the position that mechanical friction and interior leakage loss are lost, mechanical efficiency and volumetric efficiency all have been improved also can significantly shorten its axial dimension.If at the shell that rotates or cover and increase several ears, the steel ring of wheel directly can be loaded on the motor (adpting flange in the middle of saving) and realize directly driving.
Six, simplified structure, convenient processing, reduce to the requirement of material and make it to be suitable for mass-produced technology and producing in serial form so that reduce cost and price.
Seven, reduce outside dimension as far as possible, volume and weight directly drives so that be loaded in the wheel.
The structure explanation
The schematic representation of radial plunger type fixed displacement oil motor (oil pump) structure that Fig. 1 rotates for a kind of shell of developing by above-mentioned thought.Eccentric shaft 1 is fixed, and it is installed on the position that machinery needs by means of the bearing (not drawing on the figure) of right-hand member.The two ends of eccentric shaft be supported on respectively cover 7 and the rolling bearing 4 of shell 5 on, the size of bearing is very big, can bear very big radial and axial load.Turnover oilhole A and A are arranged in eccentric shaft
1(A, A
1Can exchange, depend on it and being connected of oil circuit), respectively with eccentric shaft in the middle of off-centre the oil pocket B and the B that turn
1Communicate B, B
1On external diameter, form oil groove shape, play the flow effect.Be with star-wheel 14 on off-centre turns, star-wheel and shell 5 rotate with same angular velocity during work, because eccentric effect produces a kind of relative moving about simultaneously, make the piston in the cylinder hole produce to-and-fro motion.Cylinder hole F and oil duct C are arranged in the star-wheel, and the effect of the piston 13 in the cylinder the hole suffered centrifugal force of piston and oil compensation pressure (pressure of low pressure oil circuit) at spring 12, when rotating presses down the inner plane to shell 5.Piston head has throttle orifice D that pressure oil is introduced in the oil pocket E of piston head.Lid 7 usefulness bolton (the bolt number depends on cylinder number and outside dimension) on shell 5.Cushion cover 9 is arranged in the bearing.Retaining pad 8 plays the effect that moves axially of restriction star-wheel.Retaining pad 11 works to limit star-wheel on the one hand and moves right, and also has a lot of actinoid holes that the inner chamber of oil motor (oil pump) is communicated with leakage oilhole on the eccentric shaft simultaneously, will leak oil and draw Huis oil circuit (for example fuel tank).Also have 1～n safety pin 10(n to equal the cylinder number on the shell 5), it is used to prevent that thereby shell 5 and star-wheel 14 from destroying " dislocation " phenomenon that works on because of piston takes place can not run-in synchronism the time certain accidental cause in the middle of going to two planes, and safety pin 10 also can be pressed in and cover on the 7 corresponding positions.There is oil seal cover 2 on the right side of shell 5, in oil sealing 3 is housed, be used to prevent that the leakage oil in the shell from flowing out from axle journal.Oil seal cover 2 can make has outward extending disc type brake drum for additional disk type braker or drum brake (see figure 10) are installed.When as the wheel oil motor time spent, can on lid 7 or shell 5, increase several ears (seeing Figure 11) so that directly the wheel steel ring is installed on the oil motor.The right-hand member of eccentric shaft 1 is done tapered so that fix and be installed on by support the desired area of machine with the support that matches.
The working principle summary
One, makes the working condition of oil motor
Behind input oil motor the oilhole A of high pressure oil from eccentric shaft 1 of hydraulic system, promptly be full of high pressure oil in the B chamber, this high pressure oil makes the piston (when oil motor is five cylinders, being two pistons sometimes, is that three pistons communicate with it sometimes) that communicates with it press to the inner plane of shell 5.For each piston, the center of making a concerted effort that acts on the oil pressure on it is consistent with the center of piston, and its elongation line is all by the partly eccentric center O that turns in the middle of the eccentric shaft 1
1, and the gyration center of shell 5 is the center O at eccentric shaft two ends, owing to these two centers do not overlap, when piston departs from OO
1All can produce a moment of torsion that impels shell to rotate behind the line, shell will have the trend of rotating by inverse clock when the B chamber is hyperbaric chamber.Along with the carrying out of rotating, the piston that is positioned at hyperbaric chamber one side will outwards move along the cylinder hole, constantly suck high pressure oil; When piston motion to below during the neutral position, with A, A
1The chamber is all obstructed; Continuation is moved along above-mentioned direction, piston will with low-pressure cavity A
1Communicate and begin and under the forcing on shell plane, inwardly move, with oil footpath oil duct C, the low-pressure cavity B of piston cavity
1And oil duct A
1Enter in the low pressure oil circuit of system.When with B
1The chamber connects high pressure, when the B chamber connects the low pressure oil circuit, oil motor reverses at once.Should emphatically point out, the Operating torque of motor of the present invention is to lean on the skew of piston action power to cause, the piston side is not subjected to basically because of transmitting the lateral force (Operating torque of most oil motor that this moment causes, except that the mechanism that special removal lateral force is arranged, all be to transmit) by the suffered lateral force of piston, like this, can make its mechanical friction loss minimizing, efficient improve also and the guiding shorten length of piston can be made structure more compact.
When shell has just begun to rotate and star-wheel when moving, the pressure distribution that acts between piston head and the shell plane changes immediately, consequently forcing star-wheel to follow shell by piston rotates with unequal angular velocity, at this moment, the required resisting moment that overcomes is the star-wheel resisting moment of rotating and holds together oil loss moment that its numerical value is all smaller, therefore on eccentric shaft, the suffered lateral force of piston is also very little, and this is the situation when little with the acceleration, deceleration degree at the uniform velocity.But, when the very big trend that relatively rotates variation is arranged between star-wheel and the shell for a certain reason (when for example shell braking suddenly and star-wheel continue to rotate forward under effect of inertia), depending above-mentioned pressure distribution alone changes the moment that is produced and has been not enough to drive star-wheel and the synchronous acceleration, deceleration of shell, the piston of star-wheel might be gone between two planes of shell and can't return, thereby destroys the proper functioning of oil motor.In order to prevent the generation of this phenomenon, the cylinder number that to be provided with 1～n safety pin 10(n among the present invention be oil pump), under normal operation, it does not contact with star-wheel, but, when tram that star-wheel departs from its opposite shell during to certain numerical value, safety pin is promptly run into star-wheel and is driven it with shell rotates, till being returned to when working by above-mentioned normal condition again.Practice shows, this short-cut method can guarantee that this oil pump, motor work reliably.
Situation when two, doing oil pump work
The present invention can not make an amendment fully and uses as oil pump.Still be that the shell rotatingshaft is motionless this moment.When shell rotated, the oil that forces piston and star-wheel cylinder hole inner chamber flowed into oil pocket A or A through oil duct C thereby piston inwardly moves under the forcing of the inner plane of shell 5
1; When piston forwarded the opposite side of eccentric shaft to, piston was close on the inner plane of shell 5 under the acting in conjunction of spring 12, centrifugal force and oil compensation pressure, and along with the carrying out of rotating, piston continues outwards to move, and its inner chambers volume constantly increases, with oil pocket A, A
1Oil suck, thereby realized oil-absorbing process, above-mentioned movement process go on continuously just can be continuous oil suction and pump oil.
The present invention has very strong suction capacity owing to be provided with the oil duct of stronger piston return spring 12 and larger cross-section when making low speed; Because the growth of piston centrifugal force is very fast, do not have very strong suction capacity during high speed even do not reinstall a spring yet.
Major character of the present invention
One, has very high mechanical efficiency and starting torque efficient.The static pressure transmission can extensive use on various vehicles the most critical issue be whether its efficient can meet the demands, because Operating torque is not to transmit by the side pressure of piston, its lateral force and frictional work are all very little in the present invention; Between piston head and the shell plane because balance oil pocket E and oilhole D arranged, thereby exhausted most vertical pressure all is to have avoided most mechanical friction loss by what high pressure oil transmitted; For relatively rotating, when designing appropriately, can make it the working condition near hydrostatic bearing between star-wheel and the eccentric shaft, frictional loss also can be very little.Through actual measurement, the mechanical efficiency of the oil motor of this pattern can reach 0.97, particularly, its starting torque efficient also can surpass 0.95, concerning vehicle, when needing Maximum Torque often during starting, introduce according to document (1), its starting torque efficient of oil motor of a lot of types has only 0.7～0.8.
Two, oil pump of the present invention and oil motor can be worked in very broad speed range, and it is realized by following technical characteristics:
1) profile of shell 5 and star-wheel 14 constitutes (in the outside can as required suitably reinforcement) and is easy to carry out machining by garden arc and straight line, can guarantee that like this other part has symmetry properties and balance preferably, make it when running up unlikely generation and significantly vibrate.
2) the oil duct latus rectum is very big, even the mean velocity in the pipeline is also very low when high-speed large-flow, liquid flowing loss is little, thus the efficient when having guaranteed high speed.
3) rub mainly that state of liquid friction is all approached at the position and its PV value is not high, thereby have very high mechanical efficiency, starting torque efficient and working life when making high speed.
Test shows, this oil motor (oil pump) can carry out work satisfactorily in 0～1000 rev/min speed range, short-term can reach 1500～2000 rev/mins, can satisfy the rate request of automobile when it is used as wheel motor, it had not both been wanted speed increaser and had not wanted retarder yet, and was very simple and practical.
Three, have the ability that very strong bearing adds radial and axial load, insensitive to environmental factor.Because the needs of design arrangement, it has two very big rolling bearings and very solid housing, can bear very big radial and axial load, therefore can directly be anchored on the wheel steel ring on its shell and can bear vehicle driving the time because of impulsive load and vibration that Uneven road produced.
Four, boundary dimension is smaller, can be loaded within the wheel steel ring easily and produces the required tractive force of vehicle traction.
Five, simple in structure, quantitative have only five kinds of main parts in addition, variable be seven kinds of main parts in addition, shape is all very simple and be easy to processing, and material is not had specific (special) requirements yet, therefore, cost of production is low, price can be cheap.
The major character of other part
Above-mentioned advantage all obtains by rational part design in addition, below the main key technical feature of part is in addition illustrated respectively:
One, shell: see Fig. 2, (picture is five to its basic shape on the figure for the internal surface at cydariform increases several planes, its number should be identical with the cylinder number), both ends of the surface have the screw of fastening motor cover and oil seal cover some respectively, there is bearing hole the centre, also have 1～n pin-and-hole (n is the cylinder number) of pressing safety pin in addition, machining all can be carried out in its exhausted most surface, therefore has good balance and symmetry properties.In case of necessity can be at the outer surface reinforcement to increase its rigidity and heat dispersion.
(average operating oil pressure big, when rotating speed is higher) plane F tends to be worn into corrugated piston-top surface and the sealing between it of influencing by piston-top surface when the suffered mean load of element is bigger, for this reason, can be solved with the method for the edge wear-resistant block shown in Fig. 2-3.
Two, star-wheel is a crucial part in addition, and designing improperly will seriously influence its volumetric efficiency, the working pressure of allowing and reliability.Star wheel structure among the present invention as shown in Figure 3, major character is:
1) the cylinder hole is a stepped shape, and the small sircle hole structure of scheme 1 can be used in place less demanding for pressure and that low speed uses, and its advantage is easy to process; Then should be with the flat hole scheme of scheme 2 for the higher place of working pressure and speed.The parameter in flat hole (waist shaped hole) has tangible influence to performance.
When macropore and eccentric shaft are the friction of a pair of key 2), can cause when dealing with improperly and kill and the serious problem of the very big grade of internal leakage amount.Star wheel structure among the present invention comprises edge two kinds of schemes antifriction cover and that do not inlay cover, for ordinary circumstance, if design well not inlay cover good basically, but the anti-friction bush of scheme then should consider to inlay to(for) the extra high place of operating oil pressure.
Three, eccentric shaft: the size of eccentric shaft internal oil channel and shape have tangible influence to liquid flowing resistance and high speed performance; Its rigidity also has tangible influence to mechanical friction loss and mechanical efficiency.Eccentric shaft of the present invention comprises three kinds of canonical forms:
1) two oilhole shapes, shown in Fig. 4-1, the flow groove does not have stiffening rib, its simple shape, is easy to processing, but poor-performing is suitable for all not too high situation of operating oil pressure and rotating speed.
2) process 4 oilholes with machining process and replace two oilholes so that enlarge logical oily section; Increase one or several stiffening rib at the flow groove place of eccentric shaft and increase its bending rigidity (seeing Fig. 4-2).
3) make oil duct with the method for precision casting, can obtain maximum section and slick and sly bend (seeing Fig. 4-3).
Four, piston: piston of the present invention comprises three kinds of piston structures:
1) partly scrapes out garden shape pit in the middle of its end face of simple-type (seeing Fig. 5-1), this simple shape, easy to process, shortcoming is protrude in the middle of easily the shell plane being worn into irregularly shaped, and therefore, it is lower or the flat surface grinding has been taked the lazy condition of Wear-resistant Treatment that it only should be used for working pressure.
2) end face makes the colored net form oil groove shown in Fig. 5-2, and this shape can overcome above-mentioned shortcoming to a great extent.
3) edge top formula: because the outer garden of piston has different requirements with cylinder hole, two pairs of fastnesses of piston-top surface and plane to material and processing method, the coupling of collateral security the best, preferably adopt different materials it to be combined with the method for splicing, Fig. 5-3 shows a kind of method, also available other combined method.
Five, oil seal structure: can select common cutting edge type oil sealing generally speaking for use.But, in some cases, because the internal leakage of motor can increase suddenly, thereby cause endoluminal leak pressure to rise, if having surpassed pressure that the cutting edge oil sealing can bear this moment will make cutting edge turn over to cause serious leakage of oil, at this situation, adopted a kind of simple lateral oil seal (see figure 6) among the present invention, it is made up of the flat surface grinding a rubber-like annular rubber sealing circle, plane sealing ring and oil seal cover, this oil sealing is except bearing certain interior oil pressure, after walking to have got togather, its life-span can be very long.
This plane oil sealing belongs to general basic part, except being used for oil pump of the present invention and oil motor, can also be used for the similar operational site (for example water pump seal of internal-combustion engine etc.) of many other machineries.
Six, variable-displacement oil motor (oil pump) structure.Need oil pump, oil motor are made variable under a lot of use condition or both makes the requirement of the slewing range that could satisfy transmission system of variable, and the present invention can develop into the variable structure by D-M (Determiner-Measure) construction easily.
Fig. 7 is the structural representation of variable capacity oil pump of the present invention, oil motor.The principle of variable method is to form a combined eccentricity with an eccentric bushing and an eccentric shaft to replace eccentric shaft 1 among Fig. 1.Fig. 8 is the formation of combined eccentricity and the schematic representation of variation: the off-centre that eccentric bushing is enclosed within the middle of the eccentric shaft turns, and can freely rotate, and therefore, when the eccentric direction that forwards both to was identical, its synthetic off-centre was that two eccentricity value sums (are OO
1+ O
1O
2), this moment, combined eccentricity was got maximum value; When eccentric bushing forwards near the position opposite with eccentric shaft (seeing Fig. 8-3), combined eccentricity is got near its minimum numerical value; When eccentric bushing forwarded any position between above-mentioned position to, combined eccentricity equaled O-O
1And O
1-O
2Both vectors are synthetic.As seen, adopt this method can make the combined eccentricity value at OO
1+ O
1O
2To OO
1-O
1O
2Thereby between change continuously and obtain stepless variable.
The regulation structure that Fig. 7 has drawn eccentric bushing of the present invention.Pin-and-hole is arranged on eccentric bushing, slider pin 18 is housed in the hole, 18 square toes slide in the chute of variable cover 15, the outside of variable cover has the end face tooth to be meshed with the end face tooth of variable arm 7, therefore, thus when eccentric shaft rotates, can drive eccentric bushing and rotate and reach the purpose of regulating its discharge capacity when promoting the variable arm outside in some way by variable cover.
The motor shell star-wheel holds together the oil loss when reducing high speed, when having utilized the oil motor high speed rotating in the present invention in the chamber oil pressure and inertia will leak oil by force the discharge way, it is achieved in that the retaining pad 11 in variable cover 15(or Fig. 1) go up and increase a long spoon shape oil pipe and make it to stretch to outer rim in the shell as far as possible.Like this, when the oil motor high speed rotating, can utilize spoon kinetic pressure of the oil at outer rim place to force oil to flow back to fuel tank, hold together the oil loss after trapped fuel reduces in the chamber and also will reduce thereupon from Leak hole.
Seven, eccentric bushing.Fig. 9 is several structural types of eccentric bushing of the present invention.Fig. 9-1 is suitable for the not high situation of pressure for simple form; Fig. 9-2,9-3 have drawn respectively in its flow groove increases the structure of one or two stiffening rib (size big can add several muscle), and this structure has increased the rigidity of eccentric bushing, is suitable for working condition of high voltage under.
Claims (2)
- One, quantitative oil pump or oil motor(1) a kind of oil pump of radial plunger type or oil motor, it comprises eccentric shaft, shell, lid, star-wheel, piston, spring, bearing, cushion cover, catch, safety pin, oil sealing and fastening piece.Feature of the present invention is that it is the circular housing that rotates (can as required suitably reinforcement) when having work, enclosure has and contacted several inner planes in piston head plane, it is for fixing and utilize the eccentric shaft axle journal to carry out flow, at shell or cover and be pressed with safety pin to prevent piston and corresponding shell plane dislocation.2, according to described oil pump of claim (1) or oil motor, the desirable arbitrary integer more than 2 of its piston and cylinder number, wherein more satisfactory with 3,5,7 cylinders.3,, it is characterized in that having piston return spring 12 or do not take back a spring 12 according to said oil pump of claim (1) (2) or oil motor.4, according to claim (1) to (3) said oil pump or oil motor, it is characterized by shell 5 and be circular (can as required suitably reinforcement), in several planes are arranged, the plane can make do not inlay wear-resistant block or the edge wear-resistant block.5, arrive (4) described oil pump or oil motor according to claim (1), it is characterized in that star-wheel 14 adopts edge antifriction cover or do not inlay the antifriction nested structure; Its cylinder hole is a stepped bore, and wherein aperture can make circular hole or fan shaped borehole (kidney shape hole).6, arrive (5) described oil pump or oil motor according to claim (1), it is characterized in that the oilhole of eccentric shaft makes three kinds of forms:1) oilhole is two shape holes, garden;2) oilhole is shape hole, four gardens;3) oilhole is a casting hole.That flow groove in the middle of the eccentric shaft makes no stiffening rib or one or several stiffening rib is arranged.7, according to claim (1) to (6) described oil pump or oil motor, that the top that it is characterized in that piston 13 makes dimple-shaped or make and have colored net form oil groove; Make piston all-in-one-piece or edge top formula.8, according to claim (1) to (7) described oil pump or oil motor, it is characterized in that or adopt the plane oil sealing that it is made up of the flat surface grinding with seal ring annular rubber sealing circle, plane sealing ring and oil seal cover that oil sealing adopts common cutting edge type.9, arrive (8) described oil pump or oil motor according to claim (1), it is characterized in that on retaining pad 11, outwardly directed spoon shape oil duct being arranged so that utilize oily inertia and kinetic pressure that the leakage oil in the housing is discharged by force.10, arrive (9) described oil motor according to claim (1), it is characterized in that oil seal cover is stretched out so that form brake disc of using for the installation disk type braker or the brake drum of using for installation outer-enwraped type break.11, arrive (10) described oil motor according to claim (1), it is characterized in that on shell 5 or lid 7, increasing the ear of installation wheel so that wheel directly is installed.
- Two, variable capacity oil pump or oil motor12, a kind of variable capacity oil pump of radial plunger type or oil motor, it comprises eccentric shaft, eccentric bushing, variable arm, variable cover, sliding pin, shell, lid, star-wheel, piston, bearing, cushion cover retaining pad, spring, oil sealing and fastening piece.Feature of the present invention is that it is the circular housing that rotates (can as required suitably reinforcement) when having work, and enclosure has and contacted several planes, piston head plane.It is for fixing, rotary eccentric bushing is housed above forms variable combined eccentricity and be used to carry out variable.The relative position of eccentric bushing and eccentric shaft can be regulated by variable arm, variable cover, sliding pin outside.At shell 5 or cover and be pressed with safety pin on 7 and misplace with the inner plane that prevents piston and corresponding shell.13, according to described oil pump of claim (12) or oil motor, the desirable arbitrary integer more than 2 of its piston and cylinder number, wherein more satisfactory with 3,5,7 cylinders.14,, it is characterized in that having piston return spring 12 or do not have return spring 12 according to described oil pump of claim (12) (13) and oil motor.15, according to claim (12) to (14) described oil pump or oil motor, it is characterized in that shell 5 is circular (can as required suitably reinforcement), in several planes are arranged, the plane can make the edge wear-resistant block or not inlay wear-resistant block.16, according to claim (12) to (15) described oil pump or oil motor, it is characterized in that star-wheel 14 adopts the edge anti-friction bush or do not inlay anti-friction bush; The cylinder hole is a stepped bore, and wherein aperture can make circular port or flat hole (kidney shape hole).17, arrive (16) described oil pump or oil motor according to claim (12), it is characterized in that the oilhole of eccentric shaft 1 makes following three kinds of forms:1) oilhole is the Double Circle hole;2) oilhole is four circular ports;3) oilhole is a casting hole.That flow groove in the middle of the eccentric shaft can make no stiffening rib or stiffening rib is arranged.18, according to claim (12) to (17) described oil pump or oil motor, that the top that it is characterized in that piston 13 makes circular pit or make and have colored net form oil groove; Piston can make all-in-one-piece or edge top formula.19, according to claim (12) to (18) described oil pump or oil motor, it is characterized in that or adopt the plane oil sealing that it is by with seal ring the flat surface grinding being formed on annular rubber sealing circle, plane sealing ring and the oil seal cover that oil sealing adopts common cutting edge type.20, arrive (19) described oil pump or oil motor according to claim (12), it is characterized in that adopting by eccentric bushing 16, the method that eccentric shaft 1 forms adjustable combined eccentricity realizes stepless variable.What the method also can be applied to other types produces the oil motor of piston opposite shell motion, for example Luo Sitong type (Ruston) motor of Britain with eccentric shaft.21, arrive (20) described oil pump or oil motor according to claim (12), it is characterized in that the relative position (being the size of combined eccentricity) of eccentric bushing 16 and eccentric shaft 1 can be regulated in oil pump (oil motor) outside by sliding pin 18, variable cover 15 and variable arm 17.22, according to claim (12) to (21) described oil pump or oil motor, the flow groove that it is characterized in that eccentric bushing 16 can make not to be had stiffening rib or has one or several stiffening rib.23, arrive (22) described oil pump or oil motor according to claim (12), it is characterized in that putting the cochlear oil duct of elongation, so that utilize the inertia and the kinetic pressure of oil that the leakage oil in the shell is discharged by force at variable.24, arrive (23) described oil motor according to claim (12), it is characterized in that oil seal cover is stretched out so that form brake disc of using for the installation disk type braker or the brake drum of using for the installation drum brake.25, according to claim (12) to (24) described oil motor, it is characterized in that at shell 5 or cover increase on 7 wheel is installed ear so that wheel directly is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85101715 CN85101715A (en) | 1985-04-01 | 1985-04-01 | Radial plunger type oil pump or oil motor that shell rotates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85101715 CN85101715A (en) | 1985-04-01 | 1985-04-01 | Radial plunger type oil pump or oil motor that shell rotates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85101715A true CN85101715A (en) | 1987-04-01 |
Family
ID=4792012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85101715 Pending CN85101715A (en) | 1985-04-01 | 1985-04-01 | Radial plunger type oil pump or oil motor that shell rotates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85101715A (en) |
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| CN103649457A (en) * | 2011-07-08 | 2014-03-19 | 韦尔泰克有限公司 | Downhole hydraulic pump |
| CN102341594B (en) * | 2008-12-31 | 2014-11-26 | 波克兰液压工业设备公司 | Hydraulic motor with radial pistons and control by cylinder |
| CN106988958A (en) * | 2017-04-05 | 2017-07-28 | 温州职业技术学院 | Low-speed big axial-piston hydraulic motor |
| CN114475088A (en) * | 2021-12-28 | 2022-05-13 | 太原重工股份有限公司 | Hydraulic drive axle |
-
1985
- 1985-04-01 CN CN 85101715 patent/CN85101715A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095531C (en) * | 1996-08-03 | 2002-12-04 | 杨孝志 | Stepless speed changing universal driving device |
| CN102341594B (en) * | 2008-12-31 | 2014-11-26 | 波克兰液压工业设备公司 | Hydraulic motor with radial pistons and control by cylinder |
| CN102395819A (en) * | 2009-02-27 | 2012-03-28 | 费德罗-莫格尔公司 | Piston with central directional oil flow and wrist pin lubrication feature and method of construction thereof |
| CN102395819B (en) * | 2009-02-27 | 2014-04-30 | 费德罗-莫格尔公司 | Piston with central directional oil flow and piston pin lubrication feature and method of construction thereof |
| US10344745B2 (en) | 2011-07-08 | 2019-07-09 | Welltec A/S | Downhole hydraulic pump |
| CN103649457B (en) * | 2011-07-08 | 2016-08-17 | 韦尔泰克有限公司 | Downhole hydraulic pump |
| CN103649457A (en) * | 2011-07-08 | 2014-03-19 | 韦尔泰克有限公司 | Downhole hydraulic pump |
| CN102840249B (en) * | 2012-09-12 | 2015-01-14 | 三一重工股份有限公司 | Clutch and engineering machinery |
| CN102840249A (en) * | 2012-09-12 | 2012-12-26 | 三一重工股份有限公司 | Clutch and engineering machinery |
| CN103174618A (en) * | 2013-03-29 | 2013-06-26 | 西安交通大学 | Radial plunger hydraulic pump of double-acting type outer rotor |
| CN103174618B (en) * | 2013-03-29 | 2015-05-13 | 西安交通大学 | Radial plunger hydraulic pump of double-acting type outer rotor |
| CN103159010A (en) * | 2013-03-29 | 2013-06-19 | 无锡市诚信洗选设备有限公司 | Sector-structured pressurization speed reducing wheel |
| CN103434392A (en) * | 2013-06-26 | 2013-12-11 | 贵州大学 | Novel hydraulic automobile wheel |
| CN106988958A (en) * | 2017-04-05 | 2017-07-28 | 温州职业技术学院 | Low-speed big axial-piston hydraulic motor |
| CN106988958B (en) * | 2017-04-05 | 2018-09-18 | 温州职业技术学院 | Low-speed big axial-piston hydraulic motor |
| CN114475088A (en) * | 2021-12-28 | 2022-05-13 | 太原重工股份有限公司 | Hydraulic drive axle |
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