CN1073671C - Gear pump or motor - Google Patents

Abstract

To prevent the seal gasket from separation and position displacement from its gasket groove in the case of assembling a pump, and then affecting workability and work efficiency , this new gear pump mounts the seal gasket in its gasket groove of bearing case with an engaging part, and the gasket is prevented from moving.

Description

Gear pump or motor

The present invention relates to building machinery, lathe, farm machinery etc. is the main gear pump that extensively adopts or motor (following only describe with pump).

Fig. 7 is the structural drawing of unidirectional in the past rotary type gear pump one example of expression, and Fig. 8 is the amplification profile of E-E line among Fig. 7.As shown in the figure, this gear pump comprises: the pump housing 1 with diplopore 1a, be housed in a pair of gear 2,3 among the diplopore 1a of this pump housing 1 with engagement, support the turning axle 4,5 of this gear 2,3, in above-mentioned diplopore 1a, be provided in the pair of bearing 6 with gear 2,3 adjacent position and supporting rotating shaft 4,5, be installed between this bearing support 6 and the said gear 2,3 and be attempted by a pair of movable side board 7 of the side of gear 2,3 slidably.In addition, on the inner side surface of above-mentioned bearing support 6, be concaved with the spacer groove 8 of figure-three, the gasket seal 9 of figure-three be housed in this spacer groove 8, and around with the corresponding position, high-pressure area that produces in the gear side of movable side board 7.And at this position from the hydraulic fluid of gear side direct high pressure and its hydraulic counter force is acted on the movable side board 7, and make this movable side board 7 be attempted by the side of gear 2,3 with suitable power.In a word, in the gyratory directions of each gear 2,3 turns an angle the figure-three zone of high low pressure disconnected position P, Q of position, producing high pressure for the engaging position O that connecting a pair of gear 2,3 with by this engaging position O on the face of the gear side of movable side board 7, on the face opposite of movable side board 7 with gear side with gasket seal 9 around and corresponding zone, its high-pressure area.10 girth members for setting along the low voltage side of gasket seal 9 are to be provided with as required among the figure.In addition, the both ends of the surface of the aforementioned pump housing 1 are by protecgulum 12 and bonnet 11 cappings.

But, this gear pump generally is upwards to be placed on bonnet on the horizontal plane when assembling, and by loading onto various major parts from bearing support 6 beginning successively along a definite sequence on it, but this to the bearing support 6 of protecgulum 10 sides particularly be with the state of the gasket seal 9 of having packed in the spacer groove 8 with gasket seal 9 downwards and setting-ins in the diplopore 1a of the pump housing 1.

Yet in the spacer groove 8 of in gear pump in the past, just gasket seal 9 slowly being packed into.For this reason, gasket seal 9 is deviate from from spacer groove 8 easily in assembled shaft is promised 6 process, is difficult to one side and stops it to deviate from simultaneously to carry out assembling work with finger; In case and gasket seal 9 is deviate from from spacer groove 8, then must take refitting once more apart, operating efficiency greatly reduces.Even conversely protecgulum 12 is placed on following or assembles making under the upright state of the pump housing 1 and lid 12,11, this situation also has no to improve.

In addition, after assembling is finished, if gasket seal 9 is just slowly packed into as previously mentioned in the spacer groove 8 of bearing support 6, because the gasket seal 9 after assembling is finished does not have stationarity, gasket seal 9 moves because of pressure when the pump start, so the pressure balance for movable side board 7 becomes unstable, there is the vibration of movable side board 7 so that easily produce the problem relevant with noise.

The object of the present invention is to provide a kind of gear pump that effectively addresses the above problem or motor.

For achieving the above object, the present invention adopts following composition.

Promptly, gear pump of the present invention or motor comprise: be provided in the gear side and connect the pressure balance movable side board of position, and be provided in the locational supporting member that the face opposite with gear side to this movable side board supports, be characterized on supporting member, forming spacer groove and be equipped with and distinguish the gasket seal that high low pressure is used, between gasket seal and spacer groove, be provided with gasket seal is fixed on the buckling part of using on the supporting member.

Adopt this structure, then if at the state that gasket seal is contained in the spacer groove, even because gasket seal is inserted the diplopore of the pump housing down and with bearing support, gasket seal is still remained on the buckling part of spacer groove by fastening, be difficult for peeling off or produce position deflection from bearing housing.For this reason, the assembled shaft bearing effectively improves the operation and the operating efficiency of assembling reliably.And after installation, because gasket seal is fixed on the buckling part of spacer groove, even make the pump start, pad does not move because of pressure yet.For this reason, the pressure balance function to movable side board stabilization can be carried out, and the vibration of movable side board can be solved really so that produce the problem of noise.

The accompanying drawing simple declaration.

Fig. 1 is the figure of expression one embodiment of the invention bottom bracket inner side surface.

Fig. 2 is for being installed in the figure of the figure-three gasket seal in the bearing support among the same embodiment.

Fig. 3 is the amplification profile of A-A line among Fig. 2.

Fig. 4 is the amplification profile of B-B line among Fig. 2.

Fig. 5 is the amplification profile of C-C line among Fig. 1.

Fig. 6 is the amplification profile of D-D line among Fig. 1.

Fig. 7 is for representing the general in the past gear pump or the sectional arrangement drawing of motor.

Fig. 8 is the amplification profile of E-E line among Fig. 7.

Below in conjunction with accompanying drawing 1-6 explanation one embodiment of the invention.

The fundamental composition of this gear pump is identical with the prior art shown in Fig. 7-8, and is only different in following configuration aspects.

That is, the characteristics of this gear pump are, are provided with gasket seal shown in Figure 29 is kept fastening projection 81,82,83 in the spacer groove 8 of the bearing support 6 of the supporting member as movable side board 7 shown in Figure 1.

Specifically, because gasket seal 9 forms the figure-three of the end 92,93 at the high low pressure disconnected position P that has the intermediate portion 91 at the O place, engaging position that is provided in gear pump and be provided in gear pump respectively, Q place, make end 92,93 be radial and extend to and the endoporus of the diplopore 1a of the pump housing 1 and the position that connects.Random position except that the end 92,93 of sealing pad 9 forms down L shaped cross section as shown in Figure 3, and 92,93 of ends form inverted U-shaped cross section as shown in Figure 4.

On the other hand, 8 formation of spacer groove figure-three roughly corresponding with the plane shape of above-mentioned gasket seal 9 of sealing pad 9 is housed, groove depth is roughly corresponding with the thickness of gasket seal 9.And, make above-mentioned protruding 81 with by the inwall 81a of the low voltage side of the sealing gasket film trap 8 of engaging position O near and be provided with in pairs, and between this is to projection 81 and inwall 81a, sandwich the vertical wall portion 91a of the intermediate portion 91 of gasket seal 9 as shown in Figure 5.The protrusion amount of this projection 81 is set at the size behind the thickness of plat part 9a of groove depth deduction gasket seal 9 of spacer groove 8.Make above-mentioned protruding 82 to approach to be provided with in addition, as shown in Figure 6, between this projection 82 and inwall 82a, sandwich the vertical lower wall portion 92a of the end 92 of gasket seal 9 by the inwall 82a of interior all sides of the spacer groove 8 of high low pressure disconnected position 9.The protrusion amount of this projection 82 is also identical with above-mentioned protruding 81 protrusion amount.Projection 83 also is the same, is that the inwall 83a that makes it to approach by all sides in the spacer groove 82 of high low pressure disconnected position Q is provided with, and sandwiches the vertical lower wall portion 93a of the end 93 of gasket seal 9 between this projection 83 and inwall 83a, and is set by same protrusion amount.

Adopt this composition, under the state that gasket seal 9 is contained in the spacer groove 8, gasket seal 9 closely is clamped between projection 81 and the seal groove inwall 81a respectively and between projection 82 and the seal groove inwall 82a and formation buckling part A1, A2 at engaging position O shown in Figure 5 and its vertical wall portion of high low pressure disconnected position P 91a shown in Figure 6,92a.Equally, at high low pressure disconnected position Q, the vertical wall portion 93a of gasket seal 9 closely be clamped in the projection 83 with seal groove inwall 83a between and the formation buckling part.For this reason, even gasket seal 9 is inserted the diplopore 1a of the pump housings 1 down and with bearing support 6, gasket seal 9 still is difficult for peeling off or produce position deflection from bearing support.Therefore can assemble reliably bearing support, the operation of assembling and operating efficiency are effectively improved.And owing to make gasket seal 9 keep the state that is fastened by buckling part A1, A2 etc. after installation, even make the pump start, gasket seal 9 does not move because of pressure yet.Therefore, the pressure balance to movable side board 7 stabilization can be carried out, and the vibration of movable side board 7 can be solved really so that produce the problem of the noise of pump.

Also have, the concrete structure of each one is not limited to the foregoing description.For example, be that occasion at the gear pump that is applicable to single jatharapanvartanasana illustrates of the present invention in the above-described embodiments, even but the present invention be applicable to for two jatharapanvartanasanas be that gasket seal and spacer groove are the gear pump of 8 font types and can obtain aforementioned action effect.In addition, in the above-described embodiments, the supporting member of supporting side plate is a bearing support, but also buckling part can be located on this bonnet when bonnet works as supporting member.Also have, the number of buckling part and setting place etc. also can be done various changes in the scope that does not break away from content of the present invention.

Claims (1)

1. gear pump or motor, comprise: be provided in the gear side and connect the pressure balance movable side board of position, and be provided in the locational supporting member that the face opposite with gear side to this movable side board supports, form spacer groove in the supporting member and be equipped with and distinguish the gasket seal that high low pressure is used, it is characterized in that, between gasket seal and spacer groove, be provided with gasket seal is fixed on the buckling part of using on the supporting member.

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