CN201818450U

CN201818450U - Compact high-pressure plunger piston variable dual-pump

Info

Publication number: CN201818450U
Application number: CN2010205758376U
Authority: CN
Inventors: 吴赛珍; 高志明
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-10-21
Filing date: 2010-10-21
Publication date: 2011-05-04
Anticipated expiration: 2020-10-21

Abstract

The utility model discloses a compact high-pressure plunger piston variable dual-pump, comprising shells fixedly matched in pairs, a rear cover, a cylinder body, a plunger piston skid-shoe component, an inclined disc and a plate valve, wherein a positioning pin is assembled at one end of the external ring of the plate valve; the other end of the positioning pin is inserted and assembled with the rear cover; an oil-suction annular slot is arranged at one side on the internal surface of the plate valve; the oil-suction annular slot is right matched with an oil suction hole of the valving surface of the cylinder body; two oil outlet annular slots of the same oil outlet caliber are arranged at the other side on the internal surface of the plate valve, and the two oil outlet annular slots are right matched with an oil outlet of the valving surface of the cylinder body; the application of the oil pump in engineering machinery pursues compacter structure and highly integrated functions; in the design structure, the function of the dual pumps is realized by adopting the cylinder body; the whole structure is applicable to the application of the engineering machinery; the output function of an oil source of the same flow is realized; the synchronization requirement of an external execution mechanism can be ensured effectively; the use efficiency is improved; the compact structure with one pump and two oil outlets is beneficial to improving the practical use effect and prolonging the service life; and the reliability is better.

Description

A kind of compact high-pressure plunger variable double pump

Technical field

The utility model relates to the technical field of plunger-type fuel pump in the engineering machinery, particularly a kind of compact high-pressure plunger variable double pump.

Background technique

Continuous lifting along with technical requirements, adopt the engineering machinery of double pump oil supply system to obtain more application, needs in view of high oil pressure, so it is essential adopting the duplex pump of piston structure, it mostly is the axial plunger structure present plunger type duplex pump, and mainly contains tandem double pump and two kinds of structures of parallel double pump; The in-line plunger double pump structure such as the patent No. are the Chinese utility model patent " double-swash-plate axial Variable displacement plunger pump " (notification number is CN201053377Y) of ZL200720012252.1; Form by two cylinder bodies, two cover plungers, piston shoes group, two platens, two thrust plates, two variable swash plates, swash plate bearing, housing, input shaft and a variable Effector, also act on simultaneously on the input shaft and can cancel out each other owing to the axial force direction on two cylinder bodies is opposite, two thrust plates belong to floating structure; Whole power is provided by same input shaft, it is rational in infrastructure, but other structures such as swash plate, plunger etc. all have two covers, so overall structure is not compact, overall length is longer, and is bulky, axial dimension is excessive, like this installation is brought very big inconvenience, and weight is heavier, the reliability of mounting interface is relatively poor in use.

Parallel in addition plunger double pump structure, its line shaft difference, radial dimension is excessive, and as installed difficulty height equally also is that weight is heavier, and the reliability of mounting interface is relatively poor in use.

Two kinds of structures to sum up, overall fluid output road of all respectively doing for oneself, and structures such as swash plate, plunger are divided into two separate components, because the existence of installation and accuracy of manufacturing, so the delivery outlet fluid of double pump is not quite similar, when promptly exporting actuator to, the synchronism of actuator can not guarantee.

Shown in Fig. 5, Fig. 5 a and Fig. 5 b, be the contrast pattern of housing structure for another example, its border oil groove is single layer structure, so only be suitable for single pump structure.

Fig. 6 and Fig. 6 a shown in Fig. 7 and Fig. 7 a, are two kinds of contrast patterns of flow table for another example, and structurally oil groove also is single layer structure, so only be suitable for single pump structure.

Summary of the invention

Technical problem to be solved in the utility model is the present situation at prior art, provide a kind of compact structure, reasonable in design, utilization efficiency is high, output accuracy is high, the compact high-pressure plunger variable double pump of good reliability and long service life.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: a kind of compact high-pressure plunger variable double pump, the housing and the bonnet that comprise fixing pairing, the housing inner chamber is furnished with cylinder body, be equipped with plunger piston slippery boots assembly in the cylinder body, the front end of plunger piston slippery boots assembly is affixed with swash plate through the backhaul dish, and the swash plate scarf is in the housing inner chamber; Scarf has thrust plate between cylinder body and the bonnet, and the flow face of thrust plate front-end face and rear end of the cylinder block closely pastes cover, and the flow face of rear end of the cylinder block is shaped on inlet port and oil outlet; Limit, thrust plate outer ring one end is fitted with locating stud, the other end of locating stud and bonnet inserting; Thrust plate inner face one side is shaped on the oil suction annular groove, and the inlet port of this oil suction annular groove and cylinder body flow face is over against cooperating; Thrust plate inner face opposite side is shaped on the oil ring groove that goes out that twice equate fuel-displaced bore, and twice go out oil ring groove all with the oil outlet of cylinder body flow face over against cooperating.

The measure of taking also comprises:

Be shaped on splined hole in the middle of the above-mentioned cylinder body, wear in the splined hole and be furnished with transmission shaft; Above-mentioned transmission shaft front end is rotatably assorted through big bearing and housing, and the rear end is rotatably assorted through little bearing and bonnet, and the tail end of transmission shaft also is fitted with coupling band.

The radial layout even number of above-mentioned cylinder body plunger hole, plunger hole and plunger piston slippery boots assembly match one by one.

Above-mentioned plunger piston slippery boots assembly front end is furnished with the bulb body, and the bulb body is connected with above-mentioned backhaul disk activity.

Above-mentioned swash plate lower end and housing inner chamber bottom side are rotatably assorted, and the upper end is connected with shifting block through lever, is inserted with the variable piston in this shifting block, and the slip of variable piston is fitted to the top of housing.

Above-mentioned housing top also is furnished with second valve pocket and first valve pocket, and second valve pocket and first valve pocket are arranged on the same straight line; Be sliding combined with second spool in the second above-mentioned valve pocket, be sliding combined with first spool in the first above-mentioned valve pocket, and the relative cooperation of conflicting with second spool of first spool.

The output of the second above-mentioned valve pocket, second spool has second control oil channel, and this first control oil channel is communicated with the small end of above-mentioned variable piston, and the driving of controlled variable piston small end.

The output of the first above-mentioned valve pocket, first spool has first control oil channel, and this first control oil channel is communicated with the big end of above-mentioned variable piston, and the driving of the big end of controlled variable piston.

The first above-mentioned spool outer end is furnished with driving ring; The driving ring inner ring is furnished with Regulation spring, and the outer ring is furnished with pressure spring, and pressure spring end in addition is furnished with end cap, and this end cap is connected with the housing top seal.

Above-mentioned end cap intermediate seal is equipped with the adjusting body of rod, regulates the inner of the body of rod and holds conflict to cooperate in addition with above-mentioned Regulation spring.

Compared with prior art, the utility model comprises the housing and the bonnet of fixing pairing, and the housing inner chamber is furnished with cylinder body, is equipped with plunger piston slippery boots assembly in the cylinder body, and the front end of plunger piston slippery boots assembly is affixed with swash plate through the backhaul dish, and the swash plate scarf is in the housing inner chamber; Scarf has thrust plate between cylinder body and the bonnet, and the flow face of thrust plate front-end face and rear end of the cylinder block closely pastes cover, and the flow face of rear end of the cylinder block is shaped on inlet port and oil outlet; Limit, thrust plate outer ring one end is fitted with locating stud, the other end of locating stud and bonnet inserting; Thrust plate inner face one side is shaped on the oil suction annular groove, and the inlet port of this oil suction annular groove and cylinder body flow face is over against cooperating; Thrust plate inner face opposite side is shaped on the oil ring groove that goes out that twice equate fuel-displaced bore, and twice go out oil ring groove all with the oil outlet of cylinder body flow face over against cooperating.Advantage of the present utility model is: the application of oil pump on engineering machinery is that more and more to pursue the height of the compactness of structure and function integrated, the design's structure has realized the function of double pump by single cylinder, it is when having dwindled overall volume greatly, also improved power density ratio, overall structure is suitable for the application of engineering machinery; Adopt same inlet port, two are waited flow oil outlet structure side by side, and it is reasonable in design, and is simple in structure, have realized the output function in cocurrent flow gauging source; And input power is identical, and fuel-displaced position is identical, compact overall structure, and two oil pump output accuracy height can guarantee the synchronism requirement of outside actuator effectively, utilization efficiency improves; The two fuel-displaced compact structures of one pump when further having simplified structure, have also alleviated weight, are beneficial to and improve actual using effect and working life, and reliability is better.

Description of drawings

Fig. 1 is vertical cross-sectional schematic of the utility model embodiment;

Fig. 2 is the top cross cross-sectional schematic of Fig. 1;

Fig. 3 is vertical cross-sectional schematic of cylinder body among Fig. 1;

Fig. 3 a is that schematic representation is looked on the left side of Fig. 3;

Fig. 3 b is that schematic representation is looked on the right side of Fig. 3;

Fig. 4 is the front schematic view of thrust plate among Fig. 1;

Fig. 4 a is that schematic representation is looked on the right side of Fig. 4;

Fig. 5 is the vertical cross-sectional schematic of the utility model embodiment cylinder body contrast with pattern;

Fig. 5 a is that schematic representation is looked on the left side of Fig. 5;

Fig. 5 b is that schematic representation is looked on the right side of Fig. 5;

Fig. 6 is the front schematic view of the utility model embodiment thrust plate first contrast pattern;

Fig. 6 a is that schematic representation is looked on the left side of Fig. 6;

Fig. 7 is the front schematic view of the utility model embodiment thrust plate second contrast pattern;

Fig. 7 a is that schematic representation is looked on the left side of Fig. 7.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Shown in Fig. 1 to Fig. 4 a, figure grade is described as follows: transmission shaft 1, big bearing 2, swash plate 3, housing 4, backhaul dish 5, plunger piston slippery boots assembly 6, bulb body 61, cylinder body 7, splined hole 71, plunger hole 72, thrust plate 8, oil suction annular groove 81 goes out oil ring groove 82, little bearing 9, locating stud 10, bonnet 11, coupling band 12, the second valve pockets 13, the second spools 14, first valve pocket, 15, the first spools 16, driving ring 17, Regulation spring 18, end cap 19, variable piston 20, shifting block 21 is regulated the body of rod 22, pressure spring 23.

The utility model embodiment, a kind of compact high-pressure plunger variable double pump, the housing 4 and the bonnet 11 that comprise fixing pairing, housing 4 inner chambers are furnished with cylinder body 7, be equipped with plunger piston slippery boots assembly 6 in the cylinder body 7, the front end of plunger piston slippery boots assembly 6 is affixed with swash plate 3 through backhaul dish 5, and swash plate 3 scarves are in housing 4 inner chambers; Scarf has thrust plate 8 between cylinder body 7 and the bonnet 11, and the flow face of thrust plate 8 front-end faces and cylinder body 7 rear ends closely pastes cover, and the flow face of cylinder body 7 rear ends is shaped on inlet port and oil outlet; Limit, thrust plate 8 outer ring one end is fitted with locating stud 10, the other end of locating stud 10 and bonnet 11 insertings; Thrust plate 8 inner faces one side is shaped on oil suction annular groove 81, and the inlet port of this oil suction annular groove 81 and cylinder body 7 flow faces is over against cooperating; What thrust plate 8 inner face opposite sides were shaped on that twice equate fuel-displaced bore goes out oil ring groove 82, and twice go out oil ring groove 82 all with the oil outlet of cylinder body 7 flow faces over against cooperating.

Be shaped on splined hole 71 in the middle of the cylinder body 7, wear in the splined hole 71 and be furnished with transmission shaft 1; Transmission shaft 1 front end is rotatably assorted with housing 4 through big bearing 2, and the rear end is rotatably assorted with bonnet 11 through little bearing 9, and the tail end of transmission shaft 1 also is fitted with coupling band 12.Cylinder body 7 radial layout even number plunger holes 72, plunger hole 72 matches one by one with plunger piston slippery boots assembly 6.Plunger piston slippery boots assembly 6 front ends are furnished with bulb body 61, and bulb body 61 flexibly connects with backhaul dish 5.

Swash plate 3 lower ends and housing 4 inner chamber bottom sides are rotatably assorted, and the upper end is connected with shifting block 21 through lever, is inserted with variable piston 20 in this shifting

block

21, and 20 slips of variable piston are fitted to the top of housing 4.

Housing 4 tops also are furnished with second valve pocket 13 and first valve pocket 15, and second valve pocket 13 and first valve pocket 15 are arranged on the same straight line; Be sliding combined with in second valve pocket 13 in second spool, 14, the first valve pockets 15 and be sliding combined with first spool 16, and first spool 16 cooperates with the 14 relative conflicts of second spool.

Second valve pocket

13,14 outputs of second spool have second control oil channel, and this first control oil channel is communicated with the small end of variable piston 20, and the driving of controlled variable piston 20 small ends.

First valve pocket

15,16 outputs of first spool have first control oil channel, and this first control oil channel is communicated with the big end of described variable piston 20, and controlled variable piston 20 drivings of holding greatly.

First spool, 16 outer ends are furnished with driving ring 17; Driving ring 17 inner rings are furnished with Regulation spring 18, and the outer ring is furnished with pressure spring 23, and pressure spring 23 end in addition is furnished with end cap 19, and this end cap 19 is connected with housing 4 top seals.End cap 19 intermediate seals are equipped with regulates the body of rod 22, regulates the inner of the body of rod 22 and holds conflict to cooperate in addition with Regulation spring 18.

The utility model embodiment's design principle is described as follows:

Housing 4 and bonnet 11 are rigidly connected, variable piston 20 is housed in the housing 4, first valve pocket 15, first spool 16, second valve pocket 13 and second spool 14, and there is lever to connect between first valve pocket 16 and the shifting block 21, realize servo-actuated, transmission shaft 1 is supported by the little bearing 9 that is fixed on the big bearing 2 on the housing 4 and be fixed on the bonnet 11, thrust plate 8 is fixed on the bonnet 11 by locating stud 10, and plunger piston slippery boots assembly 6 is contained within the cylinder body 7, and wherein piston shoes are pressed in them on swash plate 3 planes by backhaul dish 5, cylinder body 7 is connected with transmission shaft 1 by spline and rotates together, swash plate 3 is supported by housing 4 on one side, and the top is connected with variable piston 20 by shifting block 21, and swash plate 3 can also be realized swing with the move left and right of variable piston 20, transmission shaft 1 back also has coupling band 12, other pumps of can optionally connecting on the bonnet 11; Its cylinder body 7 radial layout even number plunger holes 71, as 10,14,18 ... and the like, the flow face is plane or sphere, its assignment hole interlaced arrangement, its thrust plate 8 flow faces are plane or sphere, and cooperate with cylinder body 7 flow faces, oil suction annular groove 81 is 1, forms for the oil groove of twice circumference and go out oil ring groove 82.

Advantage of the present utility model is: the application of oil pump on engineering machinery is that more and more to pursue the height of the compactness of structure and function integrated, the design's structure has realized the function of double pump by single cylinder, it is when having dwindled overall volume greatly, also improved power density ratio, overall structure is suitable for the application of engineering machinery; Adopt same inlet port, two are waited flow oil outlet structure side by side, and it is reasonable in design, and is simple in structure, have realized the output function in cocurrent flow gauging source; And input power is identical, and fuel-displaced position is identical, compact overall structure, and two oil pump output accuracy height can guarantee the synchronism requirement of outside actuator effectively, utilization efficiency improves; The two fuel-displaced compact structures of one pump when further having simplified structure, have also alleviated weight, are beneficial to and improve actual using effect and working life, and reliability is better.

Most preferred embodiment of the present utility model is illustrated, and various variations or the remodeling made by those of ordinary skills can not break away from scope of the present utility model.

Claims

1. compact high-pressure plunger variable double pump, the housing (4) and the bonnet (11) that comprise fixing pairing, described housing (4) inner chamber is furnished with cylinder body (7), be equipped with plunger piston slippery boots assembly (6) in the cylinder body (7), the front end of plunger piston slippery boots assembly (6) is affixed with swash plate (3) through backhaul dish (5), and described swash plate (3) scarf is in housing (4) inner chamber; Scarf has thrust plate (8) between described cylinder body (7) and the bonnet (11), and the flow face of thrust plate (8) front-end face and cylinder body (7) rear end closely pastes cover, and the flow face of cylinder body (7) rear end is shaped on inlet port and oil outlet; It is characterized in that: described thrust plate (8) limit, outer ring one end is fitted with locating stud (10), the other end of locating stud (10) and described bonnet (11) inserting; Described thrust plate (8) inner face one side is shaped on oil suction annular groove (81), and the inlet port of this oil suction annular groove (81) and cylinder body (7) flow face is over against cooperating; What described thrust plate (8) inner face opposite side was shaped on that twice equate fuel-displaced bore goes out oil ring groove (82), and twice go out oil ring groove (82) all with the oil outlet of cylinder body (7) flow face over against cooperating.

2. a kind of compact high-pressure plunger variable double pump according to claim 1 is characterized in that: be shaped on splined hole (71) in the middle of the described cylinder body (7), wear in the splined hole (71) and be furnished with transmission shaft (1); Described transmission shaft (1) front end is rotatably assorted with housing (4) through big bearing (2), and the rear end is rotatably assorted through little bearing (9) and bonnet (11), and the tail end of transmission shaft (1) also is fitted with coupling band (12).

3. a kind of compact high-pressure plunger variable double pump according to claim 2 is characterized in that: described cylinder body (7) radial layout even number plunger hole (72), plunger hole (72) matches one by one with plunger piston slippery boots assembly (6).

4. a kind of compact high-pressure plunger variable double pump according to claim 3 is characterized in that: described plunger piston slippery boots assembly (6) front end is furnished with bulb body (61), and bulb body (61) flexibly connects with described backhaul dish (5).

5. a kind of compact high-pressure plunger variable double pump according to claim 4, it is characterized in that: described swash plate (3) lower end and housing (4) inner chamber bottom side are rotatably assorted, the upper end is connected with shifting block (21) through lever, be inserted with variable piston (20) in this shifting block (21), and variable piston (20) slip is fitted to the top of housing (4).

6. a kind of compact high-pressure plunger variable double pump according to claim 5 is characterized in that: described housing (4) top also is furnished with second valve pocket (13) and first valve pocket (15), and second valve pocket (13) and first valve pocket (15) are arranged on the same straight line; Be sliding combined with second spool (14) in described second valve pocket (13), be sliding combined with first spool (16) in described first valve pocket (15), and the relative conflict with described second spool (14) of first spool (16) cooperates.

7. a kind of compact high-pressure plunger variable double pump according to claim 6, it is characterized in that: described second valve pocket (13), second spool (14) output have second control oil channel, and this first control oil channel is communicated with the small end of described variable piston (20), and the driving of controlled variable piston (20) small end.

8. a kind of compact high-pressure plunger variable double pump according to claim 6, it is characterized in that: described first valve pocket (15), first spool (16) output have first control oil channel, and this first control oil channel is communicated with the big end of described variable piston (20), and the driving of the big end of controlled variable piston (20).

9. a kind of compact high-pressure plunger variable double pump according to claim 8 is characterized in that: described first spool (16) outer end is furnished with driving ring (17); Described driving ring (17) inner ring is furnished with Regulation spring (18), and the outer ring is furnished with pressure spring (23), and described pressure spring (23) end in addition is furnished with end cap (19), and this end cap (19) is connected with described housing (4) top seal.

10. a kind of compact high-pressure plunger variable double pump according to claim 9 is characterized in that: described end cap (19) intermediate seal is equipped with regulates the body of rod (22), regulates the inner of the body of rod (22) and holds conflict to cooperate in addition with described Regulation spring (18).