CN100447412C

CN100447412C - Fluid power machine

Info

Publication number: CN100447412C
Application number: CNB2007100421250A
Authority: CN
Inventors: 俞卫权
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-18
Filing date: 2007-06-18
Publication date: 2008-12-31
Anticipated expiration: 2027-06-18
Also published as: CN101070828A

Abstract

A hydro-power machine, which is characterized in that the driving cylinder is equipped with entrance and exit for dynamic liquid. The working cylinder is equipped with suction port and discharge port for the working liquid. The driving cavity in the driving cylinder equips a driving piston, which is connected with the plunger in the inhaling and ejecting cavity of the working cylinder. There are control valves between the inhaling and ejecting cavity and the entrance and exit for the working liquid respectively. The control valves between the driving cavity and the entrance and exit for dynamic liquid. All the control valves are connected with commutators, which are controlled by commutating triggers. Its advantages is excellent capability, simple disposition, less transmission components, small volume, low cost and wide application.

Description

Hydrodynamic machine

Technical field

The present invention relates to mechanical manufacturing field, relating in particular to a kind of is the Hydrodynamic machine that core source kinetic pressure can be carried out work for power with the fluid dynamic.

Background technique

Traditional compressor, air compressor, suction booster, reciprocating pump etc. all utilize motor to rotatablely move and are converted into the to-and-fro motion of connecting rod, uninterrupted variable motion in this movement process is very big to the infringement of movement parts, cylinder body is subjected to the big and rough running of reciprocal side-thrust effect, too many use moushroom valve or the plate valve of valve that adopt of its said equipment in addition, with increasing of pressure and speed, its valve is uncontrollable and be subjected to inertia obstruction and leakage problem can greatly hinder the raising of its single stage of pressure and degree of vacuum.Especially wherein the manufacturing of bent axle requires height, the cost height, and size-constrained connecting rod, equipment volume is big, and operating mode is poor, safeguards complexity, and easily damaged parts is many, and the life-span is short.Traditional watercraft cabinet equipments etc. have considerable motor, and every motor is equipped with the relevant device of function singleness, equipment repetition and management, maintenance cost height.

Summary of the invention

The object of the present invention is to provide a kind of is the Hydrodynamic machine that core source kinetic pressure can be carried out work for power with the fluid dynamic, can obtain higher delivery pressure or obtain higher degree of vacuum, promote the existing equipment function, secondly adopt and concentrate the supply fluid pressure energy will greatly reduce required motor.

To achieve these goals, technical solution of the present invention is as follows: a kind of Hydrodynamic machine, comprise drive cylinder, clutch release slave cylinder, changement, support, it is characterized in that: drive cylinder is provided with motive fluid inlet and motive fluid outlet, clutch release slave cylinder is provided with the working fluid suction port, the working fluid exhaust port, be provided with actuator chamber in the drive cylinder, be provided with driven plunger in the actuator chamber, be provided with the suction chamber in the clutch release slave cylinder, suction is provided with plunger in the chamber, plunger is connected with driven plunger, be provided with controlled valve between suction chamber and the working fluid suction port, be provided with controlled valve between suction chamber and the working fluid exhaust port, be provided with controlled valve between actuator chamber and the motive fluid inlet, be provided with controlled valve between actuator chamber and the motive fluid outlet, the control fluid of above-mentioned controlled valve all is communicated with changement, and this Hydrodynamic machine also is provided with the commutation trigger mechanism that is connected with changement.

According to one embodiment of present invention, a clutch release slave cylinder is respectively established on the drive cylinder both sides, be equipped with the suction chamber in each clutch release slave cylinder, suction is provided with plunger in the chamber, two interior plungers of clutch release slave cylinder are connected with the two ends of driven plunger respectively, the actuator chamber of driven plunger both sides is provided with controlled valve respectively and between the motive fluid inlet, the actuator chamber of driven plunger both sides is provided with controlled valve respectively and between the motive fluid exhaust port, be respectively equipped with controlled valve between the suction chamber on both sides and the working fluid suction port, be respectively equipped with controlled valve between the suction chamber on both sides and the working fluid exhaust port.

By the control controlled valve, make external motive fluid flow in the actuator chamber, promote driven plunger and connected plunger to a side shifting, if at this moment, the suction chamber of Control work fluid inflow side and the controlled valve of working fluid suction port are opened, and the controlled valve of opposite side suction chamber and working fluid exhaust port is opened simultaneously, so working fluid flows to the working fluid exhaust port from the working fluid suction port.When driven plunger moves to the other end of actuator chamber, the commutation trigger mechanism sends signal, changement work, the controlled valve that control is opened is previously closed, the controlled valve of closing is previously opened, at this moment, driven plunger just moves to opposite side under dynamafluidal driving, makes working fluid flow to the working fluid exhaust port along other direction from the working fluid suction port.The advantage of this Hydrodynamic machine is that performance is outstanding, arrangement convenience, and transmission part is few, long service life, volume is little, and cost is low, and Applicable scope is extensive.

Description of drawings:

Fig. 1 is the profile schematic representation of this device

Fig. 2 is a working principle schematic representation of the present invention

Fig. 3 is the connection diagram of changement and commutation trigger mechanism

Fig. 4 is commutation trigger mechanism sectional drawing

Fig. 5 is a changement body sectional drawing

Fig. 6 is a spring casing coupling sectional drawing

Fig. 7 is the A-A sectional drawing among Fig. 5

The sectional drawing that Fig. 8 is connected with controlled valve for the suction chamber

Fig. 9 is the sectional drawing that actuator chamber is connected with controlled valve

Embodiment:

Below in conjunction with drawings and Examples the present invention is described in further detail.

Number in the figure changement 1, clutch release slave cylinder 2-1,2-2, the first commutation trigger mechanism 3-1, the second commutation trigger mechanism 3-2, spheroid 3-1a, 3-2a, cone valve 3-1b, 3-2b, spring 3-1c, 3-2c, lock nut 3-1d, 3-2d, contact 3-1e, 3-2e, cylinder head 4-1,4-2, drive cylinder 5, modulating valve 6, modulating valve piston 6-1, spring 6-2, Adjusting ring 6-3, cone governor core 6-4, valve rod 6-5, controlled valve 7-1,7-2,7-3,7-4,7-5,7-6,7-7,7-8, plunger 8-1,8-2, driven plunger 8-3, changeover valve core 9, valve piston 10-1,10-2, commutation valve body 10-3, push rod 11-1,11-2, Returnning spring 12-1,12-2, spring casing coupling 13, casing coupling spring 13-1, telescopic pipe 13-2, moving plate 13-3, articulating point 13-4,13-5,13-6, support 14, suction chamber 15-1,15-2, actuator chamber 16-1, bleed outlet 17-1,17-2 17-3,17-4,17-5, control fluid input 18, control fluid main entrance 18-1, control fluid outlet 18-2, working fluid suction port 19, working fluid exhaust port 20, control signal mouth 21-1,21-2, motive fluid inlet 22, motive fluid outlet 23, valve driving fluid inlet 24-1,24-2

As shown in the figure, a kind of Hydrodynamic machine, it is characterized in that this Hydrodynamic machine comprises drive cylinder 5, clutch release slave cylinder 2-1,2-2, drive cylinder 5 is provided with motive fluid inlet 22 and motive fluid outlet 23, clutch release slave cylinder 2-1,2-2 is equipped with working fluid suction port 19, working fluid exhaust port 20, be provided with actuator chamber in the drive cylinder 5, be provided with driven plunger 8-3 in the actuator chamber, clutch release slave cylinder 2-1, be equipped with suction chamber 15-1 in the 2-2,15-2, suction chamber 15-1, be provided with plunger 8-1 in the 15-2,8-2, plunger 8-1,8-2 is connected with driven plunger 8-3, suction chamber 15-1, be provided with controlled valve 7-1 between 15-2 and the working fluid suction port 19,7-3, suction chamber 15-1, be provided with controlled valve 7-2 between 15-2 and the working fluid exhaust port 20,7-4, be respectively equipped with controlled valve 7-5 between two actuator chambers and the motive fluid inlet 22,7-7, be provided with controlled valve 7-6 between two actuator chambers and the motive fluid outlet 23,7-8, above-mentioned controlled valve 7-1,7-2,7-3,7-4,7-5,7-6,7-7, the control signal mouth 21-1 of the control fluid of 7-8,21-2 all is communicated with changement 1, changement 1 is arranged in drive cylinder body periphery, this Hydrodynamic machine also is provided with the commutation trigger mechanism 3-1 that is connected with changement 1,3-2, commutation trigger mechanism 3-1,3-2 is arranged in the working cylinder two ends respectively.

As shown in Figure 1, Hydrodynamic machine of the present invention is provided with support 14, support 14 is provided with drive cylinder 5, the two ends of drive cylinder 5 are respectively equipped with clutch release slave cylinder 2-1,2-2, the two ends of clutch release slave cylinder 2-1,2-2 are provided with cylinder head 4-1,4-2, be provided with commutation trigger mechanism 3-1,3-2 in cylinder head 4-1, the 4-2, drive cylinder 5 peripheries are provided with changement 1, and changement 1 is provided with control fluid input 18 and modulating valve 6.

Fig. 2 is a working principle schematic representation of the present invention.When motive fluid enters drive cylinder 5 from power fluid input 22, drive cylinder 5 built-in driven plunger 8-3, two ends connect to an integral body with built-in plunger 8-1 of clutch release slave cylinder 2-1 and 2-2 and 8-2 respectively becomes a piston set, this piston set becomes four chambers with the cylinder interior space segmentation, middle two actuator chambers, two ends are suction chamber 15-1,15-2, and motive fluid enters and acts on driven plunger 8-3 in the drive cylinder 5 and drive the reciprocating suction fluid of two end plug 8-1,8-2.

Position as shown in Figure 2, controlled valve 7-5,7-8 open, motive fluid enters in one of them actuator chamber 16-1 from power fluid input 22, promoting driven plunger 8-3 moves downward, motive fluid in another actuator chamber flows out from power fluid output 23, and controlled valve 7-1 and 7-4 open simultaneously, and plunger 8-1 and 8-2 that driven plunger 8-3 drives two ends move downward, the suction chamber 15-1 of working fluid above controlled valve 7-1 flows into, and from following suction chamber 15-2 by controlled valve 7-4 outflow.When plunger 8-1, the 8-2 at driven plunger 8-3 and two ends move to bottom, plunger 8-2 contacts with the second commutation trigger mechanism 3-2, changement 1 work, controlled valve 7-1,7-4,7-5,7-8 switch to and close, controlled valve 7-2,7-3,7-6,7-7 switch to and open, then the plunger 8-1 and the 8-2 at driven plunger 8-3 drive two ends move up, and working fluid flows into suction chamber 15-2 from controlled valve 7-3, flow out by controlled valve 7-2 from suction chamber 15-2.

Fig. 3 is the connection diagram of changement and commutation trigger mechanism.Changement 1 is provided with control fluid input 18, be provided with commutation valve body 10-3 in the changement 1, commutation valve body 10-3 is provided with the first control signal mouth 21-1 that is communicated with first fluid control mouth, the second control signal mouth 21-2 that is communicated with second fluid control mouth, and control fluid outlet 18-2 and control fluid input 18, be provided with changeover valve core 9 in the commutation valve body 10-3, one end of this changeover valve core 9 is connected with the end of the first valve piston 10-1 by the first push rod 11-1, the other end of this changeover valve core 9 is connected with the end of the second valve piston 10-2 by the second push rod 11-2, the other end of this first valve piston 10-1 is connected with first valve driving fluid inlet 24-1, and the other end 10-2 of second valve piston is connected with second valve driving fluid inlet 24-2.The top of changeover valve core 9 is provided with the spring casing coupling 13 that is connected with the valve body that commutates.Fig. 6 shows the sectional drawing of this spring casing coupling.This spring casing coupling 13 comprises telescopic pipe 13-2, the built-in casing coupling spring of telescopic pipe 13-2 13-1, an end and the moving plate 13-3 of this telescopic pipe 13-2 are hinged, the other end of this telescopic pipe 13-2 is connected with commutation valve body 10-3, the other end of moving plate 13-3 is connected with changeover valve core 9 tops, and the also available reed of this spring casing coupling 13 substitutes.

According to one embodiment of present invention, changement 1 comprises commutation valve body 10-3, changeover valve core 9, valve piston 10-1,10-2, the first commutation trigger mechanism 3-1, the second commutation trigger mechanism 3-2, spring casing coupling 13, changeover valve core 9 is a top closure, the hollow cylinder of bottom opening or the hollow body of other shapes, it is arranged in the middle rectangular groove of commutation valve body 10-3, changeover valve core 9 switches along the vertical surface of axis, but and be limited in this rectangular groove and slide and left-right rotation, changeover valve core 9 bottoms one side is provided with the first control signal mouth 21-1, the second control signal mouth 21-2, with control fluid outlet 18-2, commutation valve body 10-3 top is provided with control fluid input 18, be provided with the first Returnning spring 12-1 between the commutation valve body 10-3 and the first valve piston 10-1, be provided with the second Returnning spring 12-2 between the commutation valve body 10-3 and the second valve piston 10-2.

Fig. 4 is commutation trigger mechanism sectional drawing.Wherein the first commutation trigger mechanism 3-1 comprises the first cone valve 3-1b, this first cone valve 3-1b is connected with the first contact 3-1e, valve port one end of this first cone valve 3-1b is communicated with the second control signal mouth 21-2, the other end of this first cone valve 3-1b valve port is communicated with first valve driving fluid inlet 24-1, also be provided with the first ball valve 3-1a between the first valve driving fluid inlet 24-1 and the second control signal mouth 21-2, wherein the second commutation trigger mechanism 3-2 comprises the second cone valve 3-2b, this second cone valve 3-2b is connected with the second contact 3-2e, valve port one end of this second cone valve 3-2b is communicated with the first control signal mouth 21-1, the other end of this second cone valve 3-2b valve port is communicated with second valve driving fluid inlet 24-2, also is provided with the second ball valve 3-2a between the second valve driving fluid inlet 24-2 and the first control signal mouth 21-1.

The first control signal mouth 21-1 and controlled valve 7-1 in the changement 1,7-4,7-5, the 7-8 and the first commutation trigger mechanism 3-1 connect, the second control signal mouth 21-2 and controlled valve 7-2,7-3,7-6, the 7-7 and the second commutation trigger mechanism 3-2 connect, when pressure fluid when control fluid input 18 enters commutation valve body 10-3 the changement 1, the inside and outside of changeover valve core 9 is respectively the height nip, outside for the zone of high pressure connects control fluid input 18 and the first control signal mouth 21-1 or the second control signal mouth 21-2, inside is that low pressure area connects control fluid outlet 18-2 and the second control signal mouth 21-2 or the first control signal mouth 21-1.Since changeover valve core 9 inside and outsides be respectively the height nip, the high low pressure sealing surface be the plane in the same side, the height pressure reduction form strong sealing.

As shown in Figure 5, if changeover valve core 9 is positioned at right positions, then the first control signal mouth 21-1 exports the fluid control signal, this signal communication to the second commutation trigger mechanism 3-2 is as signal source simultaneously, wait for that controlled device triggers the second contact 3-2e of the second commutation trigger mechanism 3-2, because the control signal mouth 21-1 of the second commutation trigger mechanism 3-2 is controlled, therefore the second ball valve 3-2a is in closed condition, this moment second valve driving fluid inlet 24-2 with the first control signal mouth 21-1 between be not communicated with.

When the contact 3-2e of the second commutation trigger mechanism 3-2 triggers controlled, then this moment second valve driving fluid inlet 24-2 with the first control signal mouth 21-1 between be communicated with, the controlled signal fluid promotes the second valve piston 10-2 and drives the second push rod 11-2 and move inward, changeover valve core 9 is finished commutation, and spool 9 switches to the working position, left side.

When switch the working position to the right on the left of changeover valve core is in, when first valve piston 10-1 drive push rod 11-1 inwardly drives, the fluid of the first valve piston 10-1 medial compartment is by bleed outlet 17-3 discharging, the fluid of the second control signal mouth 21-2 is by control fluid outlet 18-2 discharging, and the outer fluid of surveying of the second valve piston 10-2 is by second valve driving fluid inlet 24-2 discharging.The second valve piston 10-2 is subjected to the outside reset response of the second Returnning spring 12-2 to drive the second push rod 11-2 to break away from changeover valve core 9 contacts and outwards move to finish and reset, switch for commutation next time in advance and prepare, be beneficial to commutation.

As shown in Figure 5, described modulating valve 6 comprises cone governor core 6-4, the Adjusting ring 6-3 that cooperates with cone governor core 6-4 is a valve seat, cone governor core 6-4 bottom is provided with valve rod 6-5 and is connected with piston 6-1, piston 6-1 is positioned at cylinder shape valve, the side of piston 6-1 is provided with fluid control mouth and is connected with the working fluid exhaust port, piston 6-1 opposite side is provided with spring 6-2, the side of Adjusting ring 6-3 is provided with fluid control mouthful and is connected with control fluid input 18 in the changement 1, and opposite side is provided with fluid and controls mouth and be connected with external control fluid main entrance 18-1.This modulating valve is located between the control fluid input 18 in external control fluid main entrance 18-1 and the changement 1, this valve control to as if the flow of control flows body inlet 18, control signal is the hydrodynamic pressure of working fluid exhaust port 20, when working fluid exhaust port 20 hydrodynamic pressures are being set in the range of working pressure, cone governor core 6-4 in the modulating valve 6 opens, then pressure fluid is communicated with control fluid input 18 by control fluid input 18-1, otherwise then the cut-out pressure fluid is supplied with, the arresting stop operation, this valve can realize setting the adjusting in the operating range under the effect of playing safety valve.

In conjunction with Fig. 8 and Fig. 9 structure of controlled valve as can be seen.The sectional drawing that Fig. 8 is connected with controlled valve for the suction chamber.Fig. 9 is the sectional drawing that actuator chamber is connected with controlled valve.In this embodiment, controlled valve comprises spool, the valve seat that cooperates with spool, and spool is connected with valve core piston, and valve core piston is positioned at the spool cylinder body, and the spool cylinder body is provided with fluid control mouth, and fluid control mouth is connected with changement 1.Be provided with controlled valve between motive fluid inlet and the actuator chamber, when fluid control mouth incoming fluid, promote the valve core piston motion, the valve port between spool and the valve seat is opened, then motive fluid inlet or motive fluid outlet are communicated with actuator chamber.Be provided with controlled valve between suction chamber and working fluid suction port or the working fluid exhaust port, when fluid control mouth incoming fluid, the valve port between spool and the valve seat is opened in the motion of promotion valve core piston, and then working fluid suction port or working fluid exhaust port are communicated with the suction chamber.As shown in the figure, the spool cylinder body also is provided with a bleed outlet, and this bleed outlet and fluid control mouth are positioned at the two ends of valve core piston.The purpose that bleed outlet is set is to flow into from fluid control mouth when fluid, and when the promotion valve core piston moved, the unnecessary gas or the fluid that are positioned at the valve core piston opposite side in the spool cylinder body can flow out from this bleed outlet.Wherein fluid control mouth is divided into two classes, and a class is first fluid control mouthful, and another kind of is second fluid control mouthful, the triggered time difference of this two classes fluid control mouthful.In this embodiment, the spool of controlled valve adopts the cone valve form.

Fluid control mouth is divided into first fluid control mouthful and the control of second fluid mouthful, and first fluid control mouth is located at enter the mouth another actuator chamber of controlled valve 7-1 between the controlled valve 7-5 and suction chamber 15-1 and working fluid suction port 19 between 22 and cylinder body right lower side and motive fluid of the actuator chamber 16-1 that is included in the cylinder body upper left side and motive fluid and exports the controlled valve 7-4 between the controlled valve 7-8 and suction chamber 15-2 and working fluid exhaust port 20 between 23.Second fluid control mouth is located at another actuator chamber of controlled valve 7-2 between the controlled valve 7-6 and suction chamber 15-1 and working fluid exhaust port 20 between the actuator chamber 16-1 that is included in the cylinder body upper right side and the motive fluid outlet 23 and cylinder body lower-left side and the motive fluid controlled valve 7-3 between the controlled valve 7-7 and suction chamber 15-2 and working fluid suction port 19 between 22 that enters the mouth.

Described in the present invention fluid can be liquids and gases.What adopt in this embodiment is the situation of two clutch release slave cylinders, also can adopt the situation of single cylinder, by the to-and-fro motion suction working fluid of plunger in the single cylinder.

Owing to adopted said structure, directly directly move back and forth as power with fluid pressure energy, there has not been the to-and-fro motion of connecting rod, there have not been of the wearing and tearing of crank reciprocator to the additional side thrust of cylinder body, there have not been uncontrollable moushroom valve and plate valve, there has not been the manufacturing process complicated crank, there has not been the direct driving of motor, plunger and controllable cone valve have been adopted, its good airproof performance, with increasing of pressure and speed, it hindered by inertia and leakage problem is solved, and greatly improved single stage of pressure and degree of vacuum, so advantage is obvious.Moreover, the piston set that adopts driven plunger and plunger to form, the pressure reduction phenomenon that produces in different piston areas owing to fluid pressure action has realized that stronger pressure changes, output fluid pressure is at double in driving fluid pressure, secondly, concentrating to Hydrodynamic machine provides fluid pressure energy integrated central power supply system, required motor will greatly be reduced, in addition, with this feature and meet the claim scope and the fluid dynamic machine equipment that forms is applicable to different function occasions, its advantage is that performance is outstanding, arrangement convenience, transmission part is few, long service life, volume is little, cost is low, Applicable scope is extensive.

Claims

1, Hydrodynamic machine, comprise drive cylinder, clutch release slave cylinder, changement, it is characterized in that: drive cylinder is provided with motive fluid inlet and motive fluid outlet, clutch release slave cylinder is provided with the working fluid suction port, the working fluid exhaust port, be provided with actuator chamber in the drive cylinder, be provided with driven plunger in the actuator chamber, be provided with the suction chamber in the clutch release slave cylinder, suction is provided with plunger in the chamber, plunger is connected with driven plunger, be provided with controlled valve between suction chamber and the working fluid suction port, be provided with controlled valve between suction chamber and the working fluid exhaust port, be provided with controlled valve between actuator chamber and the motive fluid inlet, be provided with controlled valve between actuator chamber and the motive fluid outlet, above-mentioned controlled valve all is communicated with changement, and this Hydrodynamic machine also is provided with the commutation trigger mechanism that is connected with changement.

2, Hydrodynamic machine according to claim 1, it is characterized in that the drive cylinder both sides respectively establish a clutch release slave cylinder, be equipped with the suction chamber in each clutch release slave cylinder, suction is provided with plunger in the chamber, two interior plungers of clutch release slave cylinder are connected with the two ends of driven plunger respectively, the actuator chamber of driven plunger both sides is provided with controlled valve respectively and between the motive fluid inlet, the actuator chamber of driven plunger both sides is provided with controlled valve respectively and between the motive fluid exhaust port, be respectively equipped with controlled valve between the suction chamber on both sides and the working fluid suction port, be respectively equipped with controlled valve between the suction chamber on both sides and the working fluid exhaust port.

3, Hydrodynamic machine according to claim 1 and 2 is characterized in that controlled valve comprises valve seat, is located at the spool in the valve seat, spool is connected with valve core piston, valve core piston is positioned at the spool cylinder body, and the spool cylinder body is provided with fluid control mouth, and fluid control mouth is connected with changement.

4, Hydrodynamic machine according to claim 1 and 2, it is characterized in that: described plunger and piston connect to an integral body becomes a piston set, plunger is built in two ends columniform clutch release slave cylinder central authorities, piston is built in the columniform drive cylinder, this piston set becomes four chambers with the cylinder interior space segmentation, middle two actuator chambers, two ends are the suction chamber.

5, Hydrodynamic machine according to claim 1, it is characterized in that: described changement is provided with control fluid main entrance, be provided with the commutation valve body in the changement, be provided with changeover valve core in the commutation valve body, one end of this changeover valve core is connected with an end of first valve piston by first push rod, the other end of this changeover valve core is connected with an end of second valve piston by second push rod, the other end of this first valve piston is connected with first valve driving fluid inlet, the other end of second valve piston is connected with second valve driving fluid inlet, be provided with first Returnning spring between the commutation valve body and first valve piston, be provided with second Returnning spring between the commutation valve body and second valve piston.

6, Hydrodynamic machine according to claim 5, it is characterized in that: be provided with square groove in the commutation valve body, be provided with the first control signal mouth in the square groove, the second control signal mouth and control fluid outlet, commutation valve body top is provided with the control fluid input, changeover valve core is a top closure, the hollow cylinder of bottom opening or the hollow body of other shapes, the sealing surface between this changeover valve core and the commutation valve body is the plane, in changeover valve core bottom one side.

7, Hydrodynamic machine according to claim 6, it is characterized in that: the changeover valve core top in the described changement is provided with the spring casing coupling that is connected with the valve body that commutates, this spring casing coupling comprises telescopic pipe, the built-in casing coupling spring of telescopic pipe, one end and the moving plate of this telescopic pipe are hinged, the other end of this telescopic pipe is connected with the commutation valve body, and the other end of moving plate is connected with the changeover valve core top.

8, Hydrodynamic machine according to claim 6, it is characterized in that: the commutation trigger mechanism comprises the first commutation trigger mechanism and the second commutation trigger mechanism, the first commutation trigger mechanism comprises first cone valve, this first cone valve is connected with first contact, valve port one end of this first cone valve is communicated with the second control signal mouth, the other end of this first cone valve valve port is communicated with first valve driving fluid inlet, also be provided with first ball valve between the first valve driving fluid inlet and the second control signal mouth, wherein the second commutation trigger mechanism comprises second cone valve, this second cone valve is connected with second contact, valve port one end of this second cone valve is communicated with the first control signal mouth, the other end of this second cone valve valve port is communicated with second valve driving fluid inlet, also is provided with second ball valve between the second valve driving fluid inlet and the first control signal mouth.

9, Hydrodynamic machine according to claim 6, it is characterized in that: be provided with modulating valve between the control fluid input in control fluid main entrance and the changement, this modulating valve comprises the cone governor core, regulating valve seat is an Adjusting ring, cone governor core bottom is provided with valve rod and is connected with regulating piston, regulating piston is positioned at cylinder block, one side of regulating piston is provided with fluid control mouth and is connected with the working fluid exhaust port, the regulating piston opposite side is provided with Regulation spring, one side of Adjusting ring is provided with fluid control mouthful and is connected with control fluid input in the changement, and opposite side is provided with fluid and controls mouth and be connected with external control fluid main entrance.