CN202203037U

CN202203037U - Piston cylinder polarization type radial plunger motor

Info

Publication number: CN202203037U
Application number: CN2011203392463U
Authority: CN
Inventors: 赵元蔚
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-13
Filing date: 2011-09-13
Publication date: 2012-04-25
Anticipated expiration: 2021-09-13

Abstract

Provided is a piston cylinder polarization type radial plunger motor. Four plunger cylinder barrels are evenly distributed on a main casing (18), an offset (H) is arranged on the centre line of between an axis and a bent axle (15) each plunger cylinder barrel, one end of a plunger (11) is in a ball head structure, a piston shoe (13) is installed on the ball head of the plunger (11), a retaining piece (12) formed by two semi circles is arranged on the piston shoe (13), a spring snap ring (7) is installed on the piston shoe (13) outside the retaining piece (12), the plunger (11) and the piston shoe (13) are jointed together through the spring snap ring (7) and the retaining piece (12), the ball head of the plunger (11) is limited to rotate in a ball socket, the other end of the piston shoes (13) is contacted with an excircle of an eccentric wheel (15) of the bent axle, retaining ring (17 and 17') are respectively arranged at the left end and the right end of the piston shoe (13), the piston shoe (13) is hooped on the surface of the excircle of the eccentric wheel of the bent axle (15), so that the piston shoe (13) can slide on the surface of the excircle of the eccentric wheel of the bent axle (15).

Description

A kind of piston cylinder offset radial plunger piston motor

Technical field

The utility model relates to the structure of piston cylinder radial plunger piston motor.

Background technique

Low speed high torque hydraulic motor extensive use in the various machineries of low speed, heavy duty.It adopts the plunger type element mostly, and two kinds of axial piston and radial plunger types are arranged.Can divide single-acting formula and multiaction formula by its revolution effect number of times.In order to obtain low speed and big torque, adopt high pressure and big discharge capacity, its boundary dimension and volume and rotary inertia are all very big.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 take place, can't rotate.Behind patching recovery piston shoes surface, the probability that oil hydraulic motor is resumed work is very low, occurs piston shoes when the oil hydraulic motor band is carried again and partly occurs leaking, and seize takes place.Through a large amount of experimental analyses, reason is after repairing the piston shoes surface, and very difficult recovery makes the axis of connecting rod just in time through the surperficial symmetry center of piston shoes; 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 the slit; Leakage of oil takes place, and the instantaneous piston shoes sealing surface that makes of high pressure oil is destroyed, and seize takes place.

Summary of the invention

The purpose of the utility model provides a kind of piston cylinder offset radial plunger piston motor.

The utility model is a kind of piston cylinder offset radial plunger piston motor; Bent axle 15 is housed in main casing 18, and bent axle 15 1 ends are located in main casing 18 by bearing 6, and bent axle 15 the other ends are by the 6 ' location of the bearing on the front cover 16 that is contained in main casing 18 front ends; Front cover 16 is fixed on main casing 18 front ends; Four equally distributed plunger cases are arranged on the main casing 18, and the axis of each plunger case has a side-play amount H apart from the center line of bent axle 15, and an end of plunger 11 is a ball head structure; Piston shoes 13 are installed on the bulb of plunger 11; Two semicircle blocks of forming 12 are housed on piston shoes 13, on the piston shoes 13 in block 12 outsides, spring arch clasp 7 are housed, plunger 11 and piston shoes 13 are connected as one through spring arch clasp 7 and block 12; The bulb of plunger 11 is limited in the ball-and-socket rotates, the other end of piston shoes 13 contacts with the eccentric wheel cylindrical of bent axle 15.The right ends of piston shoes 13 respectively has a back-up ring 17,17 ', by back-up ring 17,17 ' with piston shoes 13 hoop 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.

The first annular chamber M of first section B-B of pintle 5 communicates with the first semi-annular chambers F in the oil distributing zone of second section C-C; The second annular chamber N of the 3rd section D-D communicates with the second semi-annular chambers G in the oil distributing zone of second section C-C; The first semi-annular chambers F respectively with the 3rd semi-annular chambers K in the equilibrium oil district of the 4th cross section A-A, the 5th section E-E; The 4th semi-annular chambers K ' communicates; The second semi-annular chambers G in the oil distributing zone respectively with the 5th semi-annular chambers J in the equilibrium oil district of the 4th cross section A-A, the 5th section E-E, the 6th semi-annular chambers J ' communicates; During pintle 5 rotation, the first annular chamber M of first section B-B all the time with pintle housing 2 on the first working oil oil duct P communicate, the second annular chamber N of the 3rd section D-D all the time with pintle housing 2 on the second working oil oil duct I communicate.

The utility model adopts and makes plunger and Machining of Connecting Rod is an integral body, and adopts ball-joint with piston shoes, and the other end of piston shoes contacts with the eccentric wheel cylindrical of bent axle; Shortened the distance of the centre of sphere, be easy to guarantee the hydraulic action symmetry piston shoes centre of sphere of piston shoes surface generation like this, unbalance loading has not taken place to the piston shoes surface; The sealing surface of piston shoes is contacted with slip plane all the time; Guarantee good slipping property, reduce the piston shoes manufacture difficulty, the increase of oil hydraulic motor life-span, processing, the maintenance difficulty of this type are reduced.

Description of drawings

Fig. 1 is the structural drawing of the piston cylinder offset radial plunger piston motor of the utility model; Fig. 2 is that the A-A of pintle is to sectional drawing; Fig. 3 be the B-B of pintle to sectional drawing, Fig. 4 be the C-C of pintle to sectional drawing, Fig. 5 is that the D-D of pintle is to sectional drawing; Fig. 6 be the E-E of pintle to sectional drawing, Fig. 7 is that L-L among Fig. 1 is to sectional drawing.

Embodiment

As shown in Figure 1, the piston cylinder offset radial plunger piston motor of the utility model comprises main casing 18, bent axle 15, rolling bearing 6; 6 ', four

plunger

11a, 11b, 11c; 11d, four piston shoes 13a, 13b, 13c; 13d, pintle 5, pintle housing 2, front cover 16 and rear end cover 4 main parts size constitute.Profile of the present invention is the four stars shape, and four equally distributed plunger cases are arranged on the main casing 18, and is as shown in Figure 7, and the axis of each plunger case has a side-play amount H apart from the center line of bent axle 15; As shown in Figure 1; The outside of plunger case is equipped with cylinder barrel flange 8; Cylinder barrel flange 8 is fixed on the main casing 18 by screw 9, and bent axle 15 is housed in main casing 18, and bent axle 15 1 ends are located in main casing 18 by bearing 6; Bent axle 15 the other ends are by the 6 ' location of the bearing on the front cover 16 that is contained in main casing 18 front ends, and front cover 16 is fixed on main casing 18 front ends by screw 14.Plunger 11 is housed in the plunger case on the main casing 18, two seal rings 10 are housed on plunger 11 circumference.One end of plunger 11 is a ball head structure; Piston shoes 13 are installed on the bulb of plunger 11; Two semicircle blocks of forming 12 are housed on piston shoes 13; On the outside of block 12 piston shoes 13, spring arch clasp 7 is housed, plunger 11 and piston shoes 13 is connected as one, the bulb of plunger 11 is limited in the ball-and-socket rotates through spring arch clasp 7 and block 12.The other end of piston shoes 13 contacts with the eccentric wheel cylindrical of bent axle 15.The right ends of piston shoes 13 respectively has a back-up ring 17; 17 ', by back-up ring 17,17 ' with piston shoes 13 hoop 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, but can not break away from the eccentric wheel outer round surface of bent axle 15.On main casing 18, be fixed with pintle housing 2 through screw 1, an end of pintle housing 2 passes through fixedly rear end cover 4 of screw 3, and pintle 5 is contained in the pintle housing 2, and pintle 5 and 15 coaxial connections of bent axle drive pintles 5 by bent axle 15 and rotate synchronously.Have the first working oil oil duct P and the second working oil oil duct I on the pintle housing 2.

Four oil ducts are arranged on main casing 18, and an end leads at each plunger case pumping cavity, the other end respectively with pintle housing 2 on four oil ducts communicate.

As shown in Figure 7, the span of side-play amount H is: 0＜H＜60mm.

Like Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, shown in Figure 6, pintle is divided into equilibrium oil district, oil distributing zone, working oil district.The 4th cross section A-A, the 5th section E-E are the equilibrium oil district, and second section C-C is an oil distributing zone, and first section B-B, the 3rd section D-D are the working oil district.The first annular chamber M of first section B-B of pintle 5 communicates with the first semi-annular chambers F in the oil distributing zone of second section C-C; The second annular chamber N of the 3rd section D-D communicates with the second semi-annular chambers G in the oil distributing zone of second section C-C; The first semi-annular chambers F respectively with the 3rd semi-annular chambers K in the equilibrium oil district of the 4th cross section A-A, the 5th section E-E; The 4th semi-annular chambers K ' communicates; The second semi-annular chambers G in the oil distributing zone respectively with the 5th semi-annular chambers J in the equilibrium oil district of the 4th cross section A-A, the 5th section E-E, the 6th semi-annular chambers J ' communicates; During pintle 5 rotation, the first annular chamber M of first section B-B all the time with pintle housing 2 on the first working oil oil duct P communicate, the second annular chamber N of the 3rd section D-D all the time with pintle housing 2 on the second working oil oil duct I communicate.

As shown in Figure 1; All be processed with damping hole in piston shoes 13 and the plunger 11; Hydraulic oil can communicate plunger case and piston shoes 13 bottom t by force through damping hole, and the balance that between piston shoes 13 and plunger 11, keep-ups pressure promotes bent axle 15 rotations through pressure oil; Let 15 seal actions that play pressure oil of piston shoes 13 relative bent axles, not as main force transfer element.

The working procedure of the utility model is: when the P mouth connect high-pressure oil pipe and I mouth and connects low pressure fuel pipe, the high pressure oil of P mouth got into the annular chamber M in pintle working oil district, is got into the semi-annular chambers F of oil distributing zone by annular chamber M; At this moment semi-annular chambers F delivers to plunger 11a through two oil ducts on pintle housing 2 and the main casing 18 respectively with pressure oil, and the top pumping cavity of 11d is introduced the pressure balance chamber on the piston shoes 13 by plunger 11 and the damping hole on the piston shoes 13 with high pressure oil; Act on simultaneously on the bent axle 15 eccentric wheel cylindricals,

plunger

11a, 11d receive the high pressure oil effect; Inwardly move along plunger case, it is big that the pumping cavity volume becomes, under bent axle 15 eccentric effects; Make plunger 11b through piston shoes 13; 11c outwards moves along plunger case, the pumping cavity smaller volume, and pumping cavity fluid is through the semi-annular chambers G of two oil ducts entering pintle oil distributing zones of the correspondence on corresponding two oil ducts on the main casing 18 and the pintle housing 2; Get into the annular chamber N in working oil district by semi-annular chambers G; Since annular chamber N all the time with pintle housing 2 on hydraulic fluid port I communicate, plunger 11b at this moment, the pumping cavity fluid of 11c flows out through hydraulic fluid port I.So the directed force F that high pressure oil acts on

plunger

11a and 11d acts on bent axle 15 through piston shoes 13, to the rotating center O formation torque T of bent axle, bent axle counterclockwise rotates.Along with bent axle 15 rotates under the effect of torque T; Because pintle 5 and 15 coaxial connections of bent axle; So the eccentric wheel of pintle 5 and bent axle 15 phase place all the time is consistent; Therefore outside plunger movable working oil chamber keeps and the I mouth connects the low pressure fuel pipe connection, and inwardly the maintenance of plunger movable working oil chamber connects the low pressure fuel pipe connection with the P mouth.Each plunger case will communicate with high pressure oil-feed and low pressure oil return successively, guarantees that bent axle rotates continuously.If the oil inlet and oil return mouth exchanges, then oil hydraulic motor counter-rotating.

Claims

1. piston cylinder offset radial plunger piston motor; Bent axle (15) is housed in main casing (18), and bent axle (15) one ends are located in main casing (18) by bearing (6), and bent axle (15) the other end is located by the bearing (6 ') on the front cover (16) that is contained in main casing (18) front end; Front cover (16) is fixed on main casing (18) front end; It is characterized in that four equally distributed plunger cases are arranged on the main casing (18), the axis of each plunger case has a side-play amount (H) apart from the center line of bent axle (15), and an end of plunger (11) is a ball head structure; Piston shoes (13) are installed on the bulb of plunger (11); Two semicircle blocks of forming (12) are housed on piston shoes (13), on the piston shoes (13) in block (12) outside, spring arch clasp (7) are housed, plunger (11) and piston shoes (13) are connected as one through spring arch clasp (7) and block (12); The bulb of plunger (11) is limited in the ball-and-socket rotates, the other end of piston shoes (13) contacts with the eccentric wheel cylindrical of bent axle (15); The right ends of piston shoes (13) respectively has a back-up ring (17,17 '), by back-up ring (17,17 ') piston shoes (13) is bound round on the eccentric wheel outer round surface of bent axle (15), and piston shoes (13) can be slided at the eccentric wheel outer round surface of bent axle (15);

First annular chamber (M) of first section (B-B) of pintle 5 communicates with first semi-annular chambers (F) in the oil distributing zone of second section (C-C); Second annular chamber (N) of the 3rd section (D-D) communicates with second semi-annular chambers (G) in the oil distributing zone of second section (C-C); First semi-annular chambers (F) respectively with the 3rd semi-annular chambers (K) in the equilibrium oil district of the 4th section (A-A), the 5th section (E-E); The 4th semi-annular chambers (K ') communicate; Second semi-annular chambers (G) in the oil distributing zone respectively with the 5th semi-annular chambers (J) in the equilibrium oil district of the 4th section (A-A), the 5th section (E-E), the 6th semi-annular chambers (J ') communicates; During pintle (5) rotation; First annular chamber (M) of first section (B-B) all the time with pintle housing (2) on the first working oil oil duct (P) communicate, second annular chamber (N) of the 3rd section (D-D) all the time with pintle housing (2) on the second working oil oil duct (I) communicate.

2. piston cylinder offset radial plunger piston motor according to claim 1 is characterized in that the span of side-play amount (H) is: 0＜H＜60mm.

3. piston cylinder offset radial plunger piston motor according to claim 1; It is characterized in that all being processed with damping hole in piston shoes (13) and the plunger (11); Hydraulic oil can communicate plunger case and piston shoes (13) bottom t by force through damping hole; The balance that between piston shoes (13) and plunger (11), keep-ups pressure promotes bent axle (15) rotation through pressure oil, let piston shoes (13) relatively bent axle (15) only play the seal action of pressure oil.