CN104110348A - Offset type radial plunger motor of five-star single-action piston cylinder - Google Patents

Abstract

The invention provides an offset type radial plunger motor of a five-star single-action piston cylinder, which belongs to the dynamic equipment field. The offset type radial plunger motor comprises a main casing, an antifriction bearing, five plungers, five sliding shoes, a flow distribution shaft, a flow distribution shaft casing, a front end cap and a rear end cap; five uniformly distributed plunger cylinders are arranged on the main casing, a cylinder flange is arranged outside the plunger cylinder, the cylinder flange is fixed on the main casing by a screw, a plunger is arranged in the plunger cylinder of the main casing, two sealing rings are arranged on the circumference of the plunger, a ball head structure is arranged at one end of the plunger, and the plunger is connected to the sliding shoe. The offset type radial plunger motor is capable of easily ensuring that the hydraulic acting force generated on the surface of the sliding shoes is symmetrical to the sphere centre of the sliding shoes, eccentric load is not generated, the sealing surface of the sliding shoes is contacted to the slip plane, so that good slipping performance can be guaranteed, sliding shoes manufacture difficulty is reduced, life service of the motor is increased, and the processing and maintenance difficulty can be reduced.

Description

Five-pointed star single-action piston cylinder polarization type radial plunger motor

Technical field

The present invention relates to chain drive field, be specifically related to five-pointed star single-action piston cylinder polarization type radial plunger motor.

Technical background

Low speed high torque hydraulic motor extensive use in the various machineries of low speed, heavy duty.It adopts plunger type element mostly, has two kinds of axial piston and radial plunger types.By it, often transfer to number of times and can divide single-acting formula and multiaction formula.In order to obtain low speed and large torque, adopt high pressure and large discharge capacity, its boundary dimension and volume and rotary inertia are all very large.The plunger case axis of existing single-acting link type radial plunger piston motor passes through crankshaft axis.Plunger and connecting rod adopt ball-joint, and the piston shoes surface of the other end of connecting rod contacts with the eccentric wheel cylindrical of bent axle.In the maintenance of oil hydraulic motor, find, when the piston shoes of connecting rod partly occur leaking, seize to occur, cannot rotate.By patching, recover behind piston shoes surface, the probability that oil hydraulic motor is resumed work is very low, occurs again that leaking partly appears in piston shoes while often making oil hydraulic motor band carry, and seize occurs.Through great many of experiments analysis, reason is to repair behind piston shoes surface, very difficult recovery makes the axis of connecting rod just in time by the symmetry center on piston shoes surface, cause the relative connecting rod ball pivot of hydraulic coupling center asymmetric, under the effect of high pressure oil, cause unbalance loading, make the relative slip surface of sealing surface of piston shoes produce gap, leakage of oil occurs, and the instantaneous piston shoes sealing surface that makes of high pressure oil is destroyed, and seize phenomenon occurs.

Summary of the invention

In order to address the above problem, the present invention adopts and makes plunger and Machining of Connecting Rod is an integral body, and adopt ball-joint with piston shoes, the other end of piston shoes contacts with the eccentric wheel cylindrical of bent axle, shortened the distance of the centre of sphere to piston shoes surface, be easy to so the symmetrical piston shoes centre of sphere of hydraulic action that guarantees that piston shoes surface produces, there is not unbalance loading, the sealing surface of piston shoes is contacted with slip plane all the time, guarantee good slipping property, reduce piston shoes manufacture difficulty, the increase of oil hydraulic motor life-span, processing, the maintenance difficulty of this type are reduced.

Five-pointed star single-action piston cylinder polarization type radial plunger motor of the present invention, comprises main casing, rolling bearing, five plungers, five piston shoes, pintle, pintle housing, front cover and rear end cover, the profile of five-pointed star single-action piston cylinder polarization type radial plunger motor is five-pointed star shape, main casing is provided with five equally distributed plunger cases, the outside of plunger case is provided with cylinder barrel flange, cylinder barrel flange is fixed on main casing by screw, bent axle is housed in main casing, bent axle one end is located in main casing by bearing, the bent axle the other end is located by the bearing being contained on the front cover of main casing front end, front cover is fixed on main casing front end by screw, on main casing, be fixed with pintle housing, pintle is contained in pintle housing, pintle is coaxially connected with bent axle, on pintle housing, have working oil oil duct, one end leads at each plunger case pumping cavity, the other end communicates with five oil ducts on pintle housing respectively, in plunger case on main casing (18), plunger is housed, two seal rings are housed on plunger circumference, one end of plunger is ball head structure, it is characterized in that described plunger connects and is connected with slipper socket.

Preferably, two semicircle blocks that form are housed on piston shoes,, by spring arch clasp and block, plunger is connected with piston shoes and be-body.

Preferably, the other end of piston shoes contacts with the eccentric wheel cylindrical of bent axle.

Preferably, respectively have-individual back-up ring of the two ends, left and right of piston shoes.

The present invention, with making plunger and Machining of Connecting Rod, be an integral body, and adopting ball-joint with piston shoes, the other end of piston shoes contacts with the eccentric wheel cylindrical of bent axle, has shortened the distance of the centre of sphere to piston shoes surface, be easy to so the symmetrical piston shoes centre of sphere of hydraulic action that guarantees that piston shoes surface produces, there is not unbalance loading, the sealing surface of piston shoes is contacted with slip plane all the time, guarantee good slipping property, reduce piston shoes manufacture difficulty, the increase of oil hydraulic motor life-span, processing, the maintenance difficulty of this type are reduced.

Accompanying drawing explanation

Fig. 1 is five-pointed star single-action piston cylinder polarization type radial plunger motor structural representation.

Reference character: 1-screw, 2-pintle housing, 3-screw, 4-rear end cover, 5-pintle, 6-bearing, 7-spring arch clasp, 8-cylinder barrel flange, 9-screw, 10-seal ring, 11-plunger, 12-block, 13-piston shoes, 14-screw, 15-bent axle, 16-front cover, 17-back-up ring, 18-main casing.

Embodiment

Five-pointed star single-action piston cylinder polarization type radial plunger motor of the present invention, mainly comprises main casing 18, bent axle 15, rolling bearing 6, five plungers 11, five piston shoes 13, pintle 5, pintle housing 2, front cover 16 and rear end cover 4.The profile of motor is five-pointed star shape, has five equally distributed plunger cases on main casing 18, and the axis of each plunger case has certain deviation amount apart from main casing 18 bearing hole axis.The outside of plunger case is provided with cylinder barrel flange 8, cylinder barrel flange 8 is fixed on main casing 18 by screw 9, bent axle 15 is housed in main casing 18, bent axle 15 one end by bearing 6 in the interior location of main casing 18, bent axle 15 the other ends are by bearing 6 location that are contained on the front cover 16 of main casing 18 front ends, and front cover 16 is fixed on main casing (18) front end by screw 14.Plunger 11 is housed in the plunger case on main casing 18, two seal rings 10 are housed on plunger 11 circumference.One end of plunger 11 is ball head structure, piston shoes 13 are installed on the bulb of plunger 11, two semicircle blocks 12 that form are housed on piston shoes 13, on the outside of block 12 piston shoes 13, spring arch clasp 7 is housed, by spring arch clasp 7 and block 12, plunger 11 and piston shoes 13 are connected as one, the bulb of plunger 11 can only be rotated in ball-and-socket, can not separate.The other end of piston shoes 13 contacts with the eccentric wheel cylindrical of bent axle 15.Respectively there is a back-up ring 17 at the two ends, left and right of piston shoes 13, by back-up ring 17, on the eccentric wheel outer round surface of bent axle 15, piston shoes (13) can be slided at the eccentric wheel outer round surface of bent axle 15 on piston shoes 13 hoops, but can not depart from the eccentric wheel outer round surface of bent axle 15.On main casing 18, by screw 1, be fixed with pintle housing 2, fixedly rear end cover 4 of screw 3 is passed through in one end of pintle housing 2, and pintle 5 is contained in pintle housing 2, and pintle 5 is coaxially connected with bent axle 15, by bent axle 15, drives pintle 5 synchronous rotaries.On pintle housing 2, have working oil oil duct.

On main casing 18, have five oil ducts, one end leads at each plunger case pumping cavity, and the other end communicates with five oil ducts on pintle housing 2 respectively.In piston shoes 13 and plunger 11, be all processed with damping hole, hydraulic oil can communicate by force plunger case and piston shoes 13 bottom t by damping hole, between piston shoes 13 and plunger 11, keep pressure balance, by pressure oil, promote bent axle 15 rotations, allow 15 seal actions that play pressure oil of the relative bent axle of piston shoes 13, not as main force transfer element.

Claims (4)

1. five-pointed star single-action piston cylinder polarization type radial plunger motor, comprise main casing (18), rolling bearing (6), five plungers (11), five piston shoes (13), pintle (5), pintle housing (2), front cover (16) and rear end cover (4), the profile of five-pointed star single-action piston cylinder polarization type radial plunger motor is five-pointed star shape, main casing (18) is provided with five equally distributed plunger cases, the outside of plunger case is provided with cylinder barrel flange (8), cylinder barrel flange (8) is fixed on main casing (18) by screw (9), bent axle (15) is housed in main casing (18), bent axle (15) one end is located in main casing (18) by bearing (6), bent axle (15) the other end is by bearing (6) location being contained on the front cover (16) of main casing (18) front end, front cover (16) is fixed on main casing (18) front end by screw (14), on main casing (18), be fixed with pintle housing (2), pintle (5) is contained in pintle housing (2), pintle (5) is coaxially connected with bent axle (15), pintle housing has working oil oil duct on (2), one end leads at each plunger case pumping cavity, the other end communicates with five oil ducts on pintle housing (2) respectively, plunger (11) is housed in the plunger case on main casing (18), on plunger (11) circumference, two seal rings (10) are housed, one end of plunger (11) is ball head structure, it is characterized in that described plunger (11) is connected with piston shoes (13) ball-joint.

2. five-pointed star single-action piston cylinder polarization type radial plunger motor as claimed in claim 1, it is characterized in that being equipped with on described piston shoes (13) blocks (12) of two semicircle compositions,, by spring arch clasp (7) and block (12), plunger (11) is connected with piston shoes (13) for-body.

3. five-pointed star single-action piston cylinder polarization type radial plunger motor as claimed in claim 1, is characterized in that the other end of described piston shoes (13) contacts with the eccentric wheel cylindrical of bent axle (15).

4. five-pointed star single-action piston cylinder polarization type radial plunger motor as claimed in claim 1, is characterized in that the two ends, left and right of described piston shoes (13) respectively have-individual back-up ring (17).