CN201335011Y

CN201335011Y - Floating side plate for high-pressure gear pump

Info

Publication number: CN201335011Y
Application number: CNU2008202236057U
Authority: CN
Inventors: 戴元龙
Original assignee: SICHUAN CHANGJIANG HYDRAULIC COMPONENT CO Ltd
Current assignee: SICHUAN CHANGJIANG HYDRAULIC COMPONENT CO Ltd
Priority date: 2008-12-18
Filing date: 2008-12-18
Publication date: 2009-10-28
Anticipated expiration: 2018-12-18

Abstract

The utility model discloses a floating side plate for a high-pressure gear pump, which comprises two shaft holes and a compensating groove formed on the end surface of the high-pressure side of the floating side plate. The floating side plate is characterized in that a groove is formed on the end surface of the high-pressure side of the floating side plate in the balancing region of each shaft hole corresponding to the compensating groove, two sections of connected arc-shaped grooves are formed on the end surface of the other side of the floating side plate corresponding to the compensating groove and the two grooves, and the arc-shaped grooves and the compensating groove and the two groove on the end surfaces of the two sides of the floating side plate are communicated with each other via respective through holes. The floating side plate for the high-pressure gear pump effectively reduces the radial hydraulic pressure of a bearing, and can not change the gradual distribution rule of the high-pressure side radial hydraulic pressure, thereby resulting in good load reduction effect.

Description

The floating side plate that is used for high-pressure gear pump

Technical field

The utility model relates to a kind of floating side plate that is used for high-pressure gear pump.

Background technique

At present, main engine factory's (as loader, hoist, bulldozer etc.) are more and more higher to the pressure rating and the requirement in working life of gear pump mostly both at home and abroad, the wearing and tearing and the damage of gear pump bearing (or axle) are the keys that influences its pressure-raising and life-span, and reduce gear pump bearing (or axle) force in radial is the effective means of dealing with problems, particularly important to big displacement gear pump high-pressure trend, therefore must adopt rational structure, reduce the gear pump radial hydraulic pressure as far as possible;

By the gear pump radial Force Analysis being shown the fluid pressure that acts on the top circle is inequality, filler opening (low pressure) pressure is minimum, oil outlet (high pressure) pressure is the highest, because radial leakage causes pressure drop etc., the pressure distribution situation from the oil outlet to the filler opening reduces step by step; For solving the radial force imbalance problem, basic principle is that high pressure oil is guided to low voltage side regional area (equilibrium area), can make radial hydraulic pressure obtain partial equilibrium.As depicted in figs. 1 and 2, the floating side plate that generally adopts in the industry is provided with two axis holes at present, on a side end face of on high-tension side floating side plate, be provided with compensating groove 18, and outside the edge of this low voltage side part area, end face high pressure side to two of floating side plate is provided with rounded corner R; During use, as shown in Figure 3, a floating side plate 21 is installed at two ends at the driving and driven

gear

19,20 of gear pump respectively, be provided with the end face of the end face of compensating groove 18 near two gears, by outer rounded corner R high pressure oil is guided to low voltage side regional area (equilibrium area),, increased high pressure side radial hydraulic pressure (the former power of successively decreasing that should be virtually again though this method can make high and low pressure side radial force obtain partial equilibrium, now all equate with the oil outlet place), thus the off-load effect influenced.

The model utility content

The purpose of this utility model is the above-mentioned deficiency at prior art, a kind of floating side plate that is used for high-pressure gear pump is provided, it has reduced the radial hydraulic pressure of bearing effectively, does not change the high pressure side radial hydraulic pressure again by the rule that subtracts distribution, has good off-load effect.

For achieving the above object, the floating side plate that is used for high-pressure gear pump of the present utility model, it is provided with two axis holes, on a side end face of on high-tension side floating side plate, be provided with compensating groove, the equilibrium area that it is characterized in that each corresponding with compensating groove on this end face axis hole is respectively equipped with a groove, be provided with the two section curve baths that link to each other corresponding with two grooves with compensating groove on the opposite side end face of this floating side plate, the curve bath on the end face of both sides and compensating groove and curve bath and two grooves through hole by separately respectively link to each other;

Working principle of the present utility model is: high side pressure oil is by the through hole in the compensating groove, two curve baths, through hole in two curve baths, and two groove be introduced to low voltage side equilibrium region (communicating) with gear face, the equilibrium region internal pressure equates with pump discharge (high pressure side), so both do not influenced the high pressure side radial hydraulic pressure by subtracting the regularity of distribution, make the interior radial hydraulic pressure of low voltage side equilibrium area the radial hydraulic pressure numerical value in the cabin fan shape zone be equated again with the high pressure side to gear, direction is opposite, offset fully, has good off-load effect, greatly reduce the suffered radial force of gear shaft and needle bearing, promoted the pressure rank and the working life of big displacement gear pump greatly;

As further improvement of the utility model, outside two sections continuous curve baths, also be provided with the oil groove of crossing of two sections corresponding arcs, cross oil groove and be lower than corresponding curve bath; Cross the pressure decay that oil groove can prevent that the low voltage side equilibrium area is interior, remain good off-load effect;

In sum, the utility model has reduced the radial hydraulic pressure of bearing effectively, does not change the high pressure side radial hydraulic pressure again by the rule that subtracts distribution, has good off-load effect.

Description of drawings

Fig. 1 is the plan view of existing floating side plate.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the plan view of existing gear pump.

Fig. 4 is the utility model embodiment's a plan view.

Fig. 5 is the rear view of Fig. 4.

Fig. 6 is for using the plan view of gear pump of the present utility model.

The F-F sectional view of Fig. 7 Fig. 6.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

By Fig. 4 and shown in Figure 5, this is used for the floating side plate of high-pressure gear pump, it is provided with two axis holes, on a side end face of on high-tension side floating side plate, be provided with compensating groove 1, the equilibrium area of each axis hole corresponding with compensating groove 1 is respectively equipped with a groove 2 or 3 on this end face, on the opposite side end face of this floating side plate, be provided with the two section curve baths that link to each other 4 corresponding with two grooves 2 or 3 with compensating groove 1,5, curve bath 4 on the end face of both sides, 5 and compensating groove 1, and

curve bath

4,5 and two grooves 2,3 pass through through hole 6 separately respectively, 7,8 link to each other, at two sections

continuous curve baths

4,5 also are provided with the oil groove 9 excessively of two sections corresponding arcs outward, 10,

cross oil groove

9,10 are lower than

corresponding curve bath

4,5;

By Fig. 6 and shown in Figure 7, this gear pump comprises the floating side plate 15 and the bonnet 16 at protecgulum 11, driving gear 12, driven gear 13, the pump housing 14, two ends, two active chambers with sealing (oil suction chamber 17 and go out oil pocket 18) have been formed, when driving gear shaft clockwise rotates, tooth in the oil suction chamber 17 of pump withdraws from engagement gradually, oil suction chamber 17 volumes is increased form part " vacuum " and oil suction; Going out oil pocket 18, the tooth of driving gear 12 is clamp-oned the between cog of driven gear 13, uses oil pocket 18 volumes and reduces, and oil capacity constantly increases, by the oil outlet oil extraction; If run into load then produce pressure, its size depends on load, so repeatedly mechanical energy is converted to the fluid pressure energy and promotes hydraulic actuator work;

In this process, high side pressure oil is by the hole 6 of compensating groove 1 on the floating side plate 15, two

curve baths

4,5, two curve baths 4, through

hole

7 and 8 in 5, and two groove 2 and 3 two equilibrium regions (communicating) that are introduced to low voltage side with gear face, the equilibrium region internal pressure equates with pump discharge (high pressure side), so both do not influenced the high pressure side radial hydraulic pressure by subtracting the regularity of distribution, make the interior radial hydraulic pressure of low voltage side equilibrium area the radial hydraulic pressure numerical value in the cabin fan shape zone be equated again with the high pressure side to gear, direction is opposite, offset fully, has good off-load effect, greatly reduce the suffered radial force of gear shaft and needle bearing, promoted the pressure rank and the working life of big displacement gear pump greatly.

Claims

1. floating side plate that is used for high-pressure gear pump, it is provided with two axis holes, on a side end face of on high-tension side floating side plate, be provided with compensating groove, the equilibrium area that it is characterized in that each corresponding with compensating groove on this end face axis hole is respectively equipped with a groove, be provided with the two section curve baths that link to each other corresponding with two grooves with compensating groove on the opposite side end face of this floating side plate, the curve bath on the end face of both sides and compensating groove and curve bath and two grooves through hole by separately respectively link to each other.

2. the floating side plate that is used for high-pressure gear pump as claimed in claim 1 is characterized in that also being provided with the oil groove of crossing of two sections corresponding arcs outside two sections continuous curve baths, cross oil groove and be lower than corresponding curve bath.