CN2533297Y - Hydraulic constant flow pump - Google Patents

Abstract

The utility model discloses a hydraulic constant flow pump including a hydraulic pump inside a pump body 1 and an oil inlet and oil outlet cavities 42 and 52 on the left and right side as well as an oil inlet and an oil outlet 4 and 5 of the pump body 1; in particular, a constant flow valve 6 inside the pump body is provided with a sliding valve 62 inside a valve cavity that has one end against the valve cavity end and the other end against the other end of the valve cavity through a spring 64; a releasing bulge 621 on the sliding valve 62 is connected with the wall of the valve cavity; the releasing bulge 621 is arranged between a constant flow tube 51 and a releasing tube 43 staggered on the same section of the valve cavity; one end of the constant flow valve 6 is connected with an oil cavity 52 and an oil inlet tube 4 through a constant flow tube 51 and the releasing tube 43, and the other end is connected with an oil outlet through a balance tube 63. The utility model is characterized in a compact structure, good integer as well as convenient positioning and utilization based on a constant flow output; besides avoiding the heat and unsafe factors, the efficiency is increased.

Description

The hydraulic pressure constant flow pump

Technical field

The utility model relates to a kind of hydraulic pressure constant flow pump.

Background technique

In the hydraulic pressure industry, people do evenly motion in order to make executive component (load), often adopt open type hydraulic system.It is made up of oil hydraulic pump and throttling permanent-flow valve etc., the oil suction chamber of oil hydraulic pump both sides wherein, go out oil pocket respectively on oil inlet pipe and oil outlet tube tap pump into and out of hydraulic fluid port, the oil outlet of oil hydraulic pump is connected with the throttling permanent-flow valve, its oil pump capacity is controlled by this valve.But the deficiency that this system exists is, at first, oil hydraulic pump and throttling permanent-flow valve all are independent settings, and are connected by pipeline again, thereby its integrity is poor, make install and use all inconvenient; Secondly, it is many and expose to connect the pipeline of oil hydraulic pump and throttling permanent-flow valve, also very easily causes the heating value increase of system and the increase of hidden danger; Once more, based on aforesaid reason, the efficient of system is also supported.

Summary of the invention

The technical problems to be solved in the utility model provides a kind of hydraulic pressure constant flow pump for overcoming deficiency of the prior art.

The technological scheme that is adopted comprises that the oil suction chamber of oil hydraulic pump in the pump housing and its both sides is through oil inlet pipe, go out oil pocket advancing on the oil outlet tube tap pump housing, oil outlet, particularly be provided with permanent-flow valve in the pump housing, said permanent-flow valve offsets for an end and the valve pocket end of the guiding valve in its valve pocket, the other end through spring and valve pocket in addition end offset, release boss on the guiding valve is connected movingly with valve cavity wall, discharge boss and be positioned at the constant current tube that staggers mutually on the same cross section of valve pocket, release between comb, one end of permanent-flow valve is respectively through constant current tube, release the comb tap and go out oil pocket, oil inlet pipe, the other end picks out hydraulic fluid port through balance tube.

As the further improvement of technological scheme, described oil hydraulic pump is gear pump or blade plunger pump; Described gear pump is that the both sides of intermeshing driving gear, driven gear are oil suction chamber, go out oil pocket; Also has spring boss on the described guiding valve with the spring adapted; Be equipped with safety valve in the described guiding valve, said safety valve be the valve top in the valve pocket an end through spring and valve pocket end offset, the other end offsets with the needle tubing of the counter balance pocket of connection permanent-flow valve, releasing tube and release the comb connection; Described valve top is needle-like or spherical.

With respect to prior art, owing to be provided with permanent-flow valve simultaneously in the pump housing, make the constant current tube that connects oil hydraulic pump and permanent-flow valve all be adjusted to the best as required with the pipe range and the caliber ratio thereof of the oil outlet tube that is connected oil outlet, the output flow of having realized it is constant, thereby need not still can make executive component obtain constant current power under the situation of external throttling permanent-flow valve; Because oil hydraulic pump, permanent-flow valve and connecting tube all are integrated in the pump housing, so its compact structure, good integrity, it is all convenient to install, use, and has eliminated heating and unsafe factor, and its efficient also is improved again.

Description of drawings

Fig. 1 is a kind of basic structure generalized section of the present utility model.

Fig. 2 is that A-A among Fig. 1 is to sound face schematic representation.

Fig. 3 is that B-B among Fig. 1 is to generalized section.

Embodiment

Below in conjunction with accompanying drawing optimal way of the present utility model is described in further detail.

Referring to Fig. 1, Fig. 2 and Fig. 3, be provided with gear pump, permanent-flow valve 6 and safety valve 623 in the pump housing 1, wherein, gear pump is made of through filler opening 4, the oil outlet 5 of oil pocket 52 on the oil outlet tube 53 tap pump housings 1 that go out of oil inlet pipe 41, opposite side the oil suction chamber 42 of intermeshing driving and driven gear (2,3) and one side.Permanent-flow valve 6 is connected to constant current tube 51 respectively, is released comb 43 and balance tube 63 by the two ends of valve pocket; Guiding valve 62 in the valve pocket is equipped with two annular boss on it, one for discharge boss 621, another is a spring boss 622; Discharge boss 621 and be positioned at the constant current tube 51 that staggers mutually on the same cross section of valve pocket, release 43 of combs, and be connected movingly with valve pocket, the side at this releases boss 621 forms release chamber 61 thus, opposite side is a counter balance pocket 65; One end and the valve pocket end of guiding valve 62 offsets, the spring boss 622 of the other end on it, spring 64 and valve pocket in addition end offset constitute.Permanent-flow valve 6 meets going out oil pocket 52, releasing comb 43 and connect filler opening 4 on the pump housing 1 of gear pump through the constant current tube 51 of one end, connects oil outlet 5 on the pump housing 1 through the balance tube 63 of the other end.Safety valve 623 is placed in the permanent-flow valve 6, its side by valve pocket 6235 has and releases the releasing tube 6233 that comb 43 is connected, be provided with the valve top 6232 of needle-like in the valve pocket 6235, an end on this valve top 6232 through spring 6234 and valve pocket 6235 ends offset, the needle tubing 6231 of the other end and connection counter balance pocket 65 offset constitute.

During use, driving and driven gear (2, the 3) rotation that is meshing with each other, with hydraulic oil from filler opening 4 through oil inlet pipe 41 to oil suction chamber 42, be pressed into out oil pocket 52 again; At this, hydraulic oil is pressed towards two places: the one tunnel through oil outlet tube 53 to oil outlet 5, because the throttling action of oil outlet tube 53 is going out to have formed a pressure reduction between oil pocket 52 and the oil outlet 5, as long as guarantee the constant purpose that just can reach of this pressure reduction by the constant flow of oil outlet tube 53; Another road is arrived through constant current tube 51 (this caliber is bigger than oil outlet tube 53 footpaths) and is discharged chamber 61, the elastic force that this moment, guiding valve 62 overcame spring 64 under the effect of hydraulic oil pressure moves to right, unnecessary hydraulic oil is discharged back into hydraulic fluid port 4 through releasing comb 43, and the elastic force of final and spring 64 balances each other and make guiding valve 62 be in state of equilibrium; Generally speaking, the soft displacement of spring 64 is all less, thereby the pressure reduction of release chamber 61 and counter balance pocket 65 is constant.Because constant current tube 51 footpaths are big than oil outlet tube 53 footpaths, be identical with the pressure that discharges chamber 61 so go out oil pocket 52; Communicate with oil outlet 5 owing to counter balance pocket 65 again, so counter balance pocket 65 also is identical with the pressure of oil outlet 5; The pressure reduction at two ends that is oil outlet tube 53 is constant, so the constant flow by oil outlet tube 53 also is the constant flow of oil outlet 5.

Claims (6)

1, a kind of hydraulic pressure constant flow pump, the oil suction chamber (42) that comprises oil hydraulic pump in the pump housing (1) and its both sides through oil inlet pipe (41), go out oil pocket (52) on oil outlet tube (53) the tap pump housing (1) into and out of hydraulic fluid port (4,5), it is characterized in that:

1.1 be provided with permanent-flow valve (6) in the pump housing (1), said permanent-flow valve (6) is for an end and the valve pocket end of the guiding valve (62) in its valve pocket offset, the other end is held in addition with valve pocket through spring (64) and offseted, release boss (621) on the guiding valve (62) is connected movingly with valve cavity wall, discharging boss (621) is positioned at the constant current tube (51) that staggers mutually on the same cross section of valve pocket, releases between comb (43)

1.2 an end of permanent-flow valve (6) respectively through constant current tube (51), release comb (43) tap and go out oil pocket (52), oil inlet pipe (4), the other end picks out hydraulic fluid port (5) through balance tube (63).

2, pump according to claim 1 is characterized in that oil hydraulic pump is gear pump or blade plunger pump.

3, pump according to claim 2 is characterized in that gear pump is that the both sides of intermeshing driving gear (2), driven gear (3) are oil suction chamber (42), go out oil pocket (52).

4, pump according to claim 1, it is characterized in that on the guiding valve (62) also with the spring boss (622) of spring (64) adapted.

5, pump according to claim 1, it is characterized in that being equipped with in the guiding valve (62) safety valve (623), said safety valve (623) for the end on the top of the valve in the valve pocket (6235) (6232) through spring (6234) and valve pocket (6235) end offset, the other end offsets with the needle tubing (6231) of the counter balance pocket (65) of connection permanent-flow valve (6), releasing tube (6233) with release comb (43) connection.

6, pump according to claim 5 is characterized in that valve top (6232) is needle-like or spherical.