CN2839633Y

CN2839633Y - Hydraulic pressure axial plunger pump multi-chamber independent supporting piston shoes assembly

Info

Publication number: CN2839633Y
Application number: CNU2005200357848U
Authority: CN
Inventors: 刘桓龙; 王国志; 于兰英; 邓斌; 柯坚
Original assignee: Southwest Jiaotong University
Current assignee: Southwest Jiaotong University
Priority date: 2005-10-18
Filing date: 2005-10-18
Publication date: 2006-11-22
Anticipated expiration: 2015-10-18

Abstract

The utility model relates to a multi-chamber independent supporting slipper assembly of a hydraulic pressure axial plunger pump, which comprises a plurality of supporting chambers 1, a plurality of inclined buffering holes 2, a water collecting tank 3 in a slipper's ball socket, buffering holes 4 in a plunger ball head, a slipper 5 and a plunger 6. Pressure water is led in from a plunger cavity, reaches the water collecting tank 3 in the slipper's ball socket through the buffering holes 4 in the ball head, then arrives in the supporting chambers 1 on the end face of the slipper 5 through the inclined buffering holes 2 and then flows out through interstices of the slipper 5.

Description

Water Hydraulic Axial Piston Pump multi-cavity separate support slippery boots assembly

Technical field:

The utility model is relevant with the friction pair of Water Hydraulic Axial Piston Pump, and is especially relevant with piston shoes and plunger assembly.

Background technique:

Water hydraulics has advantages such as environmental protection, safety and production is compatible, is the hydraulics of greatly developing in recent years.Because tap water after directly employing is filtered or seawater are as working medium, not only cost is low, and obtains convenience, safe and reliable; Be particularly suitable for operations such as ocean operation, medical treatment, food and metallurgy.Compare with hydraulic oil, the viscosity of water is much smaller, and lubricity is relatively poor, makes that the friction pair design of hydraulic pressure element is particularly important.By the pairing of material and the optimization of structure, as far as possible the balance wearing and tearing and leak between contradiction, guarantee hydraulic pressure the element particularly volumetric efficiency and the operating life of hydraulic pamp and motor.

The hydraulic pressure piston shoes of existing main structure form have only the damping hole of a supporting chamber and a correspondence.Because moisture film is thinner than oil film, there is following deficiency in this structure; The one, antidumping rigidity is relatively poor; The 2nd, the receptance of antidumping is relatively poor, may be before balance is adjusted and swash plate generation part solid eccentric wear; Three, piston shoes are prone to the limit phenomenon of collapsing.

The content of model utility:

The purpose of this utility model provides the Water Hydraulic Axial Piston Pump multi-cavity separate support slippery boots assembly that a kind of resistance to capsizing is good, greasy property is good.

The utility model is such realization:

The utility model Water Hydraulic Axial Piston Pump multi-cavity separate support slippery boots assembly, comprise piston shoes 5 and plunger 6, the bulb of plunger 6 cooperates with the ball-and-socket of piston shoes 5, supporting chamber 1 on the piston shoes supporting end face 7 is communicated with the piston shoes ball-and-socket by damping hole 2, the bulb of plunger 6 has damping hole 4 one ends to connect ball-and-socket, the other end connects plunger cavity 8, have on the piston shoes supporting end face 7 at least two independently support chamber 1 respectively the damping hole 2 by separately be communicated with ball-and-socket.

Supporting chamber 1 is communicated with by the interior water storage tank 3 of damping hole 2 and ball-and-socket, and damping hole 4 one ends on the plunger ball connect water storage tank 3.

A plurality of supporting chambers on the piston shoes supporting end face are pressed identical central angle apart from symmetric arrangement.

A water storage tank 3 is arranged in the piston shoes ball-and-socket, and a plurality of oblique damping holes 2 are communicated with separately supporting chamber from the bottom margin of water storage tank 3.

The plunger ball area of water storage tank 3 correspondences is less than or equal to bulb and ball-and-socket cooperates 1/3rd of area.

The utility model is simple in structure, and is easy to manufacture, utilizes the principle of local independent hydrostatic support, promptly sets up many places supporting chamber at piston shoes supporting end face, independently of one another between each chamber, has the independent hydrostatic support passage of rigidity adjusting by damping hole formation separately.When piston shoes tilted, the pressure in the supporting cavity of little gap location increased, and the supporting cavity room pressure of big gap location reduces, so form the moment that opposing piston shoes topple, stop it to topple, keep the state of equilibrium of end face and swash plate, thereby guarantee the good lubrication of hydraulic pressure piston shoes pair.

Description of drawings:

Fig. 1 is a structural drawing of the present utility model.

Fig. 2 is the left view of Fig. 1.

Embodiment:

The utility model is 3 chamber separate support slippery boots assemblies, comprises 1, three oblique damping hole 2 of three supporting chambers, the damping hole 4 in the water storage tank 3 in the piston shoes ball-and-socket, plunger ball, piston shoes 5, plunger 6.

3 supporting chambers 1 are along the circumferential direction by even angular distance symmetric arrangement.

Water storage tank 3 pairing plunger ball areas are 1/3rd or 1/4th or 1/5th of bulb and ball-and-socket cooperation area in the piston shoes ball-and-socket.

3 oblique damping holes 2 are got through from the bottom margin of piston shoes ball-and-socket water storage tank 3 and supporting chamber 1 separately, guarantee that simultaneously the maximum strength of piston shoes and the continuous, sufficient of hydrostatic support supply water.

Press water flows in the piston shoes ball-and-socket water storage tank 3 by bulb damping hole 4 in plunger cavity, flows to a plurality of chambers 1 that independently support from a plurality of inclination damping holes 2 then, by the gap outflow between piston shoes supporting end face and swash plate, flows in the pump chamber at last.

When piston shoes did not tilt, because the symmetry properties of structure, supporting cavity indoor pressure in every place equated that its hydrostatic support rigidity is same as common piston shoes, has the ability that certain adaptation load variations is adjusted water film thickness.When piston shoes tilt, the pairing liquid resistance of a plurality of supporting chambers in the piston shoes supporting end face is no longer equal, one of them becomes big, two diminish in addition, so make that the liquid resistive is greatly that the indoor pressure of the supporting cavity of moisture film attenuation place correspondence raises, the liquid resistive is little to be that the supporting cavity room pressure of moisture film thickening place correspondence reduces, thereby forms a hydraulic pressure moment that allows the piston shoes antidip, up to the flat shape attitude of maintenance, just guarantee the state of equilibrium of chamber pressure and water film thickness with swash surfaces.

Claims

1, Water Hydraulic Axial Piston Pump multi-cavity separate support slippery boots assembly, comprise piston shoes (5) and plunger (6), the bulb of plunger (6) cooperates with the ball-and-socket of piston shoes (5), supporting chamber (1) on the piston shoes supporting end faces (7) is communicated with the piston shoes ball-and-socket by damping hole (2), the bulb of plunger (6) has damping hole (4) one ends to connect ball-and-socket, the other end connects plunger cavity (8), it is characterized in that having on the piston shoes supporting end faces (7) at least two independently support chamber (1) respectively the damping hole (2) by separately be communicated with ball-and-socket.

2, slippery boots assembly according to claim 1 is characterized in that supporting chamber (1), is communicated with by the interior water storage tank (3) of damping hole (2) and ball-and-socket, and damping hole (4) one ends on the plunger ball connect water storage tank (3).

3, slippery boots assembly according to claim 1 and 2, it is characterized in that a plurality of supporting chambers on the piston shoes supportings end face by identical central angle apart from symmetric arrangement.

4, slippery boots assembly according to claim 1 and 2, it is characterized in that supporting chamber is 3, evenly arranges on same circumference for 120 ° by identical central angle.

5, slippery boots assembly according to claim 2 is characterized in that a water storage tank (3) is arranged in the piston shoes ball-and-socket, and a plurality of oblique damping holes (2) are communicated with separately supporting chamber from the bottom margin of water storage tank (3).

6, slippery boots assembly according to claim 2 is characterized in that the corresponding plunger ball area of water storage tank (3) is less than or equal to bulb and ball-and-socket cooperates 1/3rd of area.