CN2475846Y

CN2475846Y - Cylinder cam-type axial plunger pump

Info

Publication number: CN2475846Y
Application number: CN 01209573
Authority: CN
Inventors: 张寿龄
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-03-22
Filing date: 2001-03-22
Publication date: 2002-02-06
Anticipated expiration: 2011-03-22

Abstract

The utility model belongs to a volume-variable mechanical pump mainly comprising a cylindrical cam, a cylinder block, pistons, a front end cover, a back end cover and a main shaft. The cylindrical cam, the cylinder block, the front and back end cover and the main shaft are in coaxial line, and a plurality of pistons are in coaxial direction with the main shaft. The cylinder is provided with piston holes, in which pistons are arranged to form a plurality of working chambers with the front and back end cover, and the cross sections are evenly distributed in planetary shape. The utility model has simple and compact structure and can be applied to some cases of the areas of pumps and motor.

Description

Cylindrical cam formula axial piston pump

The utility model relates to a kind of mechanical pump that carries out work by volume-variation.

Transfiguration mechanical pump kind is a lot, and they have structural feature separately.Different types of pump, performance has difference, and sometimes difference is also very big, and the place of each self application is arranged usually.

That the purpose of this utility model will provide is a kind of simple in structure, and own characteristics are arranged, and is applicable to the transfiguration mechanical pump of some occasion.

Below in conjunction with accompanying drawing, be that embodiment is described in detail with the oil hydraulic pump.

Fig. 1 is the utility model embodiment basic structure sectional drawing vertically.

Fig. 2 is the utility model embodiment's a plunger stereogram.

Fig. 3 is the utility model embodiment's a main shaft sectional drawing.

Fig. 4 be the utility model embodiment along Figure 1A-A to sectional view.

Fig. 5 be the utility model embodiment along Figure 1B-B to sectional view.

Fig. 6 be the utility model embodiment along Fig. 1 C-C to sectional view.

Fig. 1 has shown the utility model embodiment's basic structure.Among the figure: rolling bearing (1), rear end cover (2), back sliding bearing (3), advance oil drain out (4), oil-feed window (5), oil ring groove (6), weighing apparatus pressure ring groove (7), cylinder body (8), steel ball (9), cylindrical cam (10), plunger (11), front cover (12), oil extraction window (13), front slide bearing (14), oil drain passage (15), oil inlet passage (16), filler opening (17), advance oil extraction and isolate lid (18), main shaft (19) and oil drain out (20).

As can be seen from Figure 1, the utility model mainly is made up of cylindrical cam (10), cylinder body (8), plunger (11), front cover (12), rear end cover (2) and main shaft (19) etc., wherein, cylindrical cam (10), cylinder body (8), front cover (12), rear end cover (2) and main shaft (19) coaxial line, a plurality of plungers (11) are coaxial with main shaft (19).Cylinder body has a plurality of plunger holes on (8), and plunger (11) places in it, is slidingly matched as the gap, and constitutes forward and backward two groups of active chambers jointly with front cover (12), rear end cover (2), the cross section star evenly distributed (shown in Fig. 4,5) of embarking on journey.Main shaft (19) is relatively-stationary with cylindrical cam (10), can be made into one, wherein main shaft (19) and cylinder body (8), front cover (12), rear end cover (2) are done the circumferential surface gap and are slidingly matched, and cylindrical cam (10) is then done circumferential surface gap be slidingly matched (shown in Fig. 4-6) by steel ball (9) and plunger (11), cylinder body (8).Steel ball (9) embeds in the curved slot of plunger (11) (as shown in Figure 2) and cylindrical cam (10), can roll, institute so that cylindrical cam (10), cylinder body (8) when doing rotation relatively, plunger (11) is simultaneously reciprocating, thus active chamber work.The curved slot of cylindrical cam (10) is considered from aspects such as dynamic balancing, has adopted the form of the wavy curved slot that has two groups of equivalent Symmetrical Continuous on the circumferential surface.From Fig. 4, Fig. 5 as can be seen: the two ends that cooperate side face at cylinder body (8) with main shaft (19), the top that last each plunger hole of cylinder body (8) engages with end cap has into oil drain out (4), have oil-feed window (5), oil extraction window (13) on the main shaft (19), their ends are opposed separately, 90 degree stagger, 90 degree are staggered separately with oil inlet passage (16), the corresponding communication of oil drain passage (15) in two ends, and wherein oil inlet passage (16) is (shown in the Fig. 1,3) that the two ends oil-feed windows (5) of 90 degree that stagger is linked up by two oil ring grooves (6).Advance oil drain out (4), oil-feed window (5) and oil extraction window (13) and constitute valve of the present utility model.The quantity of oil-feed window (5), oil extraction window (13) in the valve, go up the group number decision that wavy curved slot is offered by cylindrical cam (10), advance the opening of oil drain out (4), can be equal to or slightly less than oil-feed window (5) and the width that oil extraction window (13) staggers, it can be closed.Weighing apparatus pressure ring groove (7) is opened in the two ends of cylindrical cam (10), makes the inoperative inner chamber keep total measurement (volume) constant at the volley, plays the effect of weighing apparatus pressure, avoids air to be compressed, and hinders the motion of plunger (11).

Can know from above-mentioned: two groups of wavy curved slots of cylindrical cam (10), determined the every public affairs of plunger reciprocating four strokes that circle, the hump is the dead center position.During work, the active chamber at each plunger two ends is in the oil-feed stroke and the oil extraction strokes of 90 degree respectively, advances then that oil extraction is instantaneous to be stopped simultaneously, and the counter then stroke that turn 90 degrees goes round and begins again.Therefore the oil-feed window (5) in the valve, the setting of oil extraction window (13), avoid the dead point, make the oil drain out (4) that advances of active chamber that the position of enough closing on the dead point be arranged, and strengthen the A/F of oil-feed window (5), oil extraction window (13) as far as possible, to satisfy the requirement of above-mentioned working condition, improve and advance oil extraction efficient.

Can know also that from above-mentioned the volume-variation of the utility model active chamber makes plunger realize with respect to cylinder body is reciprocating by " cylindrical cam ".Make plunger reciprocating, can drive with main axis rotation, also can drive with the cylinder body rotation, present embodiment has adopted fixed main shaft, the cylinder body rotation, and an end advances the mode of oil extraction.Under the supporting of rolling bearing (1), back sliding bearing (3), front slide bearing (14), cylinder body (8), front cover (12), rear end cover (2) integrator rotate, and drive plunger (11) work.Rolling bearing (1) is arranged on the footstalk of rear end cover (2), and front slide bearing (14), back sliding bearing (3) are separately positioned on the front cover (12) that cooperates with main shaft (19) two ends, the rear end cover (2).Advance oil extraction isolation lid (18) and be fixed on the main shaft, have filler opening (17) and oil drain out (20) on it, end face and front slide bearing (14) are slidingly matched as the gap.Advance oil extraction and isolate lid (18) except that playing the effect that makes oil inlet passage (16), oil drain passage (15) isolation, also play a part to engage with the oil exit pipe that advances of actuating device.

The utlity model has reversibility, can be used as motor and use.Its main shaft, cylinder body all can be used as output or input power, can be clockwise or counter-rotating, and therefore compact structure is applicable to many occasions.

Claims

1. cylindrical cam formula axial piston pump, form by cylindrical cam [10], cylinder body [8], plunger [11], front cover [12], rear end cover [2] and main shaft [19] etc., it is characterized in that, cylindrical cam [10], cylinder body [8], front cover [12], rear end cover [2] and main shaft [19] coaxial line, a plurality of plungers [11] are coaxial with main shaft [19]; Cylinder body has a plurality of plunger holes on [18], and plunger [11] places in it, be slidingly matched as the gap, and the active chamber that cylinder body [8] and front cover [12], rear end cover [2] constitute, it is evenly distributed that planet shape is done in the cross section.

2. cylindrical cam formula axial piston pump as claimed in claim 1, it is characterized in that cylindrical cam [10] and main shaft [19] relative fixed, also doing the circumferential surface gap by steel ball [9] and plunger [11], cylinder body [8] is slidingly matched, steel ball [9] embeds in the curved slot of plunger [11] and cylindrical cam [10], can roll.

3. cylindrical cam formula axial piston pump as claimed in claim 1, it is characterized in that main shaft [19] and cylinder body [8], front cover [12], rear end cover [2] do the circumferential surface gap and be slidingly matched, have oil-feed window [5], oil extraction window [13], cylinder body [8] on the main shaft of fitting surface [19] and go up the top that each plunger hole engages with end cap and have into oil drain out [4].

4. cylindrical cam formula axial piston pump as claimed in claim 3, the oil-feed window [5] that it is characterized in that main shaft [19] two ends is opposed with oil extraction window [13], oil-feed window [5], the oil extraction window [13] at two ends stagger separately, are linked up by oil inlet passage [16], oil drain passage [15] respectively.