CN103210210B

CN103210210B - Hydraulic pressure installation

Info

Publication number: CN103210210B
Application number: CN201180054745.0A
Authority: CN
Inventors: 斯特凡娜·维达尔
Original assignee: Poclain Hydraulics Industrie
Current assignee: Poclain Hydraulics Industrie
Priority date: 2010-09-17
Filing date: 2011-09-15
Publication date: 2015-12-02
Anticipated expiration: 2031-09-15
Also published as: US20140007766A1; WO2012035270A1; DE112011103103T5; CN103210210A; FR2965020A1; FR2965020B1

Abstract

A hydraulic pressure installation for such as motor or pump, comprising: first group of parts (1C), and it comprises housing parts; And second group of parts (1D), be fixed to described first assembly.Above-mentioned first and second groups of parts have the first surface of contact and the second surface of contact (1C ', 1D ') respectively, and these two surface of contact are extruded toward each other by the device (15) applying axial pressure and settle with being contacted with each other.First surface of contact and the second surface of contact one of at least there is coarse friction surface.By means of described surface, high moment of torsion can be transmitted between first and second groups of parts.The invention still further relates to a kind of method for the manufacture of this hydraulic pressure installation.

Description

Hydraulic pressure installation

Technical field

The present invention relates to a kind of hydraulic pressure installation (such as motor or pump), this device comprises: first component assembly, and it comprises housing parts, and cylinder body is arranged in this housing parts; And second component assembly, be fixed to described first assembly, described first and second elements have the first surface of contact and the second surface of contact respectively, and these two surface of contact are extruded toward each other by the device applying axial pressure and settle with being contacted with each other.

Background technique

Here, the device applying axial pressure executes stressed device along the axis perpendicular to these faces, and this pressure tends to two surface of contact to extrude toward each other.

In oil hydraulic motor or pump, housing generally includes multiple parts, and these parts are machined individually and are mounted to together.This class component is necessary can transfer of torque.Such as, the housing of oil hydraulic motor has: cam part, and its inner circumferential is wavy with the piston compounding practice with cylinder body; And being called as the parts distributing lid, it is around the dispenser arrangement of inside, and this distributor distributes a fluid to multiple cylinders of cylinder body.These two parts must be fixed to together, to be tightened together best.

When housing is fixing, usual distribution cover is fixed to the fixing parts on the chassis of such as vehicle and so on, and because cylinder body to determine the running of this motor relative to the rotation of cam, cam part must be fixed to this cover best and can not rotate.In the case, the moment of torsion transmitted between distribution lid with cam part is the moment of torsion resisting motor torsional moment.

And some oil hydraulic motors are provided with braking system, these braking system are arranged on and are called in the housing parts of brake cover.These parts are fixed to another housing parts, such as, be fixed to and distribute lid, and these parts must be connected on it best to transmit braking torque.

So especially, the generation of braking may be caused along with very large vibrations, instead of the braking of equilibrium.During this vibrations, very large moment of torsion must be delivered to another parts from parts of motor.Therefore, in the motor being equiped with braking device, the fastening quality between the different parts of motor is even more important.

When motor has rotary shell, motor torsional moment or braking torque are also inevitable to be transmitted between the different housings parts be assembled together.

Like this, such as oil hydraulic motor or pump and so on multiple device in, very large moment of torsion must be transmitted between the first assembly formed at multiple parts and the second assembly (each assembly can only comprise single parts).The housing parts of this moment of torsion main parts via forming the first assembly and the second assembly respectively usually transmits.

First, in order to assemble two assemblies of oil hydraulic motor, each assembly is typically provided with surface of contact.Two surface of contact are pushed toward each other, and are settled with contacting with each other by two assemblies by the device (such as, screw) applied perpendicular to the axial pressure of surface of contact.

And, usually stop other rotations rotated relative to two assemblies by the device (being generally screw) for being fastened on by two assemblies in fixing rotational position.

In such motor, the transmission of moment of torsion occurs like this:

First, lock rotatably except it and apply except the effect of axial pressure, screw serves as cutting element, that is these screws transmit a part of moment of torsion between two assemblies.And, except screw, when the moment of torsion be passed is very considerable, if necessary, cutting element as other in ball, pin etc. also can be used.

But when transmitting sizable moment of torsion between these assemblies, the quantity of the screw used and/or other cutting element and diameter must be very large.So especially, cause the bulky and complicated problem of assembly in the application of specific quantity.

For avoiding must using too many or cross large diameter screw or other cutting element, being well known that and surface of contact is glued together each other.But the method not easily performs in the industry, and assemble/disassemble operation is made to become great difficulty.

Summary of the invention

First object of the present invention overcomes the above-mentioned shortcoming existed when using and proposing the device of type in introduction, and the present invention includes the securing means of improvement, for transmitting very large moment of torsion between two parts of hydraulic pressure installation, and without the need to increasing the screw or cutting element that connect these two parts.These devices especially can keep the sealing relevant to the seepage of hydraulic fluid in the composition plane place between these two assemblies of parts.

The realization of this object is due to the following fact: in the apparatus, described first surface of contact and the second surface of contact one of at least there is coarse friction surface, therefore it can allow to carry out high moment of torsion transmission between two assemblies.

Visible, owing to being arranged on this coarse friction surface on a surface of contact, surface of contact can transmit very large moment of torsion really between two assemblies, and (this moment of torsion) even may much bigger than known embodiment before.In this way, in a device in accordance with the invention, decrease or even eliminate the user demand of cutting element of the transmission for moment of torsion.

The present invention understands the assembling of surface of contact especially in detail, and these two surface of contact are all metals, and this metal can transmit higher pressure.

The present invention especially can implement in the hydraulic pressure installation comprising rotor and stator, and such hydraulic pressure installation needs to transmit high moment of torsion usually, especially all the more so when this device comprises braking device.

Especially, the present invention can also implement in such a device: in the apparatus, and the second assembly of parts also comprises housing parts, and the device applying axial pressure is used for two housing parts to be fixed to one another.

Coarse friction surface can be arranged on all or part of of surface of contact.

In one embodiment, the first assembly also comprises mounting plate; First surface of contact and the second surface of contact are respectively formed on the wall relative with described second assembly with described mounting plate; And, the wall relative with described mounting plate with described housing parts is formed the 3rd surface of contact and the 4th surface of contact respectively.

Advantageously, this embodiment quite easily realizes.In fact, concrete operation, can be only relevant with mounting plate especially for those operations preparing coarse friction surface.

Because mounting plate (usually) is less and simpler than the miscellaneous part of formation first assembly or the second assembly (as housing parts), the specific operation on the mounting plate mentioned before therefore performing are still relatively easy.

This mounting plate can utilize usual way manufacture: shot peening (peening) and improve plate surface hardness surface treatment after, by tinsel cutting and manufacture this plate.Therefore, in this case, housing parts and the second assembly are all without any need for other specific operation.But, enable them receive the simple and mechanical processing of mounting plate may be necessary.

In the optional modification of aforesaid embodiment (having mounting plate), one of them of described 3rd surface of contact and the 4th surface of contact has coarse friction surface, to increase the value of transferable Maximum Torque between housing parts and mounting plate.These two coarse friction surfaces are arranged on two opposite sides of mounting plate, and implement on every side of mounting plate according to principle fixing rotatably of the present invention.

According to the present invention, friction surface must be coarse, makes this device can transmit high moment of torsion between two assemblies.

For this purpose, in one embodiment, one of them of described friction surface or described friction surface has and is greater than 12 μm, is preferably greater than the roughness index Ra of 18 μm, or has coarse parameter Ra and Rz that the roughness index Rz(standard ISO 4287 that is greater than 80 μm limits).In this way, this friction surface has sizable roughness, is suitable for transmitting very large moment of torsion between two elements.

In order to realize this roughness index, at least one in described friction surface or described friction surface can be the object of the surface treatment (such as, shot peening) for increasing roughness.Such process (or sand blast) can not only clean the surface of contact of these parts, can also guarantee that the surface of contact of being correlated with has enough roughness.Also be feasible for increasing other processing methods (such as grooving) of the roughness of this surface of contact.

Preferably, for increase the surface treatment of roughness be without material input surface treatment (meaning not wish that the material by used joins in friction surface).In this way, avoid the input processing of the particle comprising material, because such particle may peel off from friction surface, if they scatter in hydraulic pressure installation, can hydraulic pressure installation be damaged.

Preferably, friction surface occupies the major component of the surface of contact arrived set by it, such as, occupy at least 80% of this surface, even this surface 95% on.

In one embodiment, described or friction surface described at least one has the Vickers hardness (Vickers hardness records according to standard EN ISO6507-1) being greater than 450Hv.

In fact, when the peak and valley structure that friction surface is formed (reliefs) penetrates relative surface of contact, friction surface and towards this surface surface of contact between can realize king-sized coefficient of attachment.Large-scale moment of torsion can from a component passes to another assembly.In order to realize this target fully, by two assembled together in, when by two facing to when pressurizeing each other, these peak and valley structures must be maintained at least in part.Therefore, the Vickers hardness of friction surface must be preferably higher.More generally, the present invention also can utilize Vickers hardness to be greater than 400Hv, or the rubbing surface of even 370Hv is implemented.

In order to realize such Vickers hardness, described friction surface or friction surface described at least one can adopt the surface treatment for increasing surface hardness, such as Nitrizing Treatment.

In one embodiment, the surface hardness of at least one surface of contact relatively placed with friction surface is less than the surface hardness of described friction surface.

Preferably, the surface hardness HV of relevant surface of contact _contactthan the HV of friction surface on the other side _frictionlittle at least 20%, and as if possible to when young 30%.In other words, HV _contactpreferably be less than HV _friction× 0.8(or even HV _friction× 0.7).

Due to this difference of surface hardness, between the erecting stage of two assemblies, the peak and valley structure that friction surface is formed relatively easily can penetrate into relative surface of contact (surface hardness of the latter is less).Consequently the peak and valley structure of friction surface really engages with relative surface of contact, can transmit very large moment of torsion thus.And, do not need the pressure between two parts or attachment frictional force high especially, this moment of torsion just can be passed.

Therefore, it should be understood that the housing parts that the present invention is specially adapted to the fixing metal relatively low by hardness (such as, cast iron, cast steel or even forged steel) and makes.

And, when using mounting plate, because this mounting plate is the multiple parts phases independently parts fixing with it, therefore, it is possible to relatively freely select the material of this plate and be applied to the surface treatment of this plate.Material hard especially can be selected for this plate; To the process that this plate is applied, become coarse to make this plate or be all relatively easy to improve its surface hardness.By comparing, such process being applied to whole housing parts usually can be more complicated, and these housing parts comprise the region of meticulous manufacture, and these regions are relatively fragile and must be retained (not processing).

In a word, the present invention provides effective solution in moment of torsion transmission, and especially easily implements in industrial aspect (scale) and cost is low.

Second object of the present invention proposes a kind of method for the manufacture of the hydraulic pressure installation of type described in introduction, and the method can be formed in the connection (link) of transmitting very large moment of torsion between these two assemblies between two elements forming this device.

The realization of this object is owing to comprising the steps: in the method

A) first component assembly and second component assembly are provided, such as:

-two assemblies can be fixed to one another, to form hydraulic pressure installation, and such as motor or pump;

-two assemblies have the first surface of contact and the second surface of contact respectively;

-the first assembly comprises housing parts, is provided with cylinder body in this housing parts;

B) described surface of contact one of them on form coarse friction surface, in order to transmit high moment of torsion between two assemblies; And

D) two assemblies are assembled, to be settled with contacting with each other by two surface of contact by the device applying axial pressure.

It should be noted that, in the method, the step b) for the formation of coarse friction surface can perform when for providing and also not completed by the step a) of the different element of this device.

Relevant surface of contact is applied to form coarse friction surface by be increased being used for of proposing in the surface treatment of roughness above a kind of.

In order to improve the effect of the method further, in a kind of Implementation Modes, manufacture method also comprises the steps c) after step b): c) perform the surface treatment for increasing the surface hardness of friction surface, make the surface hardness of the surface of contact relatively placed with this friction surface be less than the surface hardness of this friction surface.

Accompanying drawing explanation

From following to the detailed description as the multiple embodiments shown in infinite example, the present invention will easily be understood, and its advantage will more clearly be manifested.This description is carried out with reference to following accompanying drawing:

Fig. 1 is the axial sectional view according to oil hydraulic motor of the present invention;

Fig. 2 is in the first embodiment, the exploded perspective view of a part for the motor of Fig. 1;

Fig. 3 is similar to Fig. 1 but comprises mounting plate and form the three-dimensional exploded view of a part for the motor of the second embodiment of the present invention;

Fig. 3 A is the sectional view from the thin portion that Fig. 3 intercepts, and it shows (section) form of mounting plate partly;

Fig. 4 is the axial sectional view of a part for the motor of Fig. 3;

Fig. 5 is the sectional view from the thin portion that Fig. 4 intercepts, and it illustrates the layout pattern of mounting plate;

Fig. 6 is the fragmentary axial cross-section of the decomposition of a part for the motor shown in Fig. 3, and it illustrates the layout pattern of mounting plate;

Fig. 7 is in the 3rd embodiment, with the three-dimensional exploded view of a part for motor like the Motor of Fig. 3, it illustrates mounting plate;

Fig. 8 is the sectional view in the thin portion of the motor of Fig. 7, shows the layout pattern of mounting plate; And

Fig. 9 A and Fig. 9 B is in the 4th and the 5th embodiment, according to the axial, cross-sectional view in the thin portion of motor of the present invention, show for other two of mounting plate possible layout patterns.

Embodiment

In the accompanying drawings, multiple different embodiment of the present invention is proposed relatively from the different modification of motor 100.In the modification that these are different, identical or similar element keeps using identical reference character.

The oil hydraulic motor 100 of Fig. 1 is the motor with radial piston.The housing of this motor is divided into four parts 1A, 1B, 1C and 1D.Parts 1B has sinuous inner circumferential and forms cam, and piston and this cam of cylinder body 2 interact.The cylinder body 2 illustrated in this case comprises the cylinder that two rows are biased, and corresponding cylinder 2 ' is angularly biased.Piston 2 " be arranged in these cylinders and also slide wherein.Motor drive shaft 3 is non-rotatably set up relative to cylinder body 2 by spline, and extends in the parts 1A of housing, the bearing 4 of this housing bearing motor.The latter comprises internal fluid distributor 5, and wherein distribution ducts 6 is alternately connected to the conduit pipe 7 of cylinder body 2.The inner side that distributor is being called as the housing parts 1C distributing lid extends.Brake axle 8 also extends in the inside of distributor, and it is fixed rotatably relative to axle 3 and cylinder body 2.The end relative with cylinder body 2 of this axle extends in the housing parts 1D being called as brake cover.This end and this brake member support multiple brake member (it is made up of the dish 9 be plugged on each other in the case).Brake piston 10 is pressurized by spring 11, with pushing disk 9, brake contact occurs, and can carry out reverse control by pressure fluid in arrester 12.

Motor 100 is the types with running shaft, and because its housing is fixing, the housing parts 1A therefore comprising fastener is not illustrated together with the chassis of such as vehicle.

This kind of motor needs to carry out large-scale moment of torsion transmission, and this transmission is mainly carried out with two kinds of operator schemes: drive pattern (motoring mode) and braking mode.

In drive pattern, moving axis 3 and transmitting torque, axle 3 is with to be designed to drive outer member via flange 3 ' by rotating cylinder body 2.For making motor running, housing parts 1B or cam must remain on preferably around the fixing rotational position of axis A of parts 1A of housing being fixed to stationary element.Therefore, the moment of torsion resisting motor torsional moment must transmit between parts 1A and the 1B of housing.

On the contrary, during braking, braking torque at the parts 1D of housing and must transmit between parts 1A, 1B and 1C.

In this way, different housing parts 1A, 1B, 1C especially sizable moment of torsion can be transmitted together with must be fastened to best with 1D.

For this purpose, in order to parts 1A, 1B and 1C is fixing in rotation, first motor 100 comprises surface of contact, in order to these parts are attached to parts 1A, 1B and 1C in couples.These faces are plat surface and perpendicular to the spin axis A of this motor; These faces comprise the face 1A ' between parts 1A and 1B and the face 1B between 1B ', parts 1B and 1C " and 1C ", face 1C ' between parts 1C and 1D and 1D '.

In addition, fastening screw trip bolt 14 guarantees that parts 1A, 1B and 1C are joined together in a known manner.

On the contrary, fixed component 1C and 1D is realized according to the present invention.These parts 1C and 1D represents according to the first assembly of the present invention and the second assembly, must transmit very large moment of torsion between the first assembly and the second assembly.

In order to fixed component 1C and 1D, first motor 100 comprises screw 15.These parts 1C and 1D is pulled to each other, and therefore forms and be pulled to each other according to the surface of contact 1C ' of the first surface of contact of the present invention and the second surface of contact and 1D '.Screw 15 is devices of the axis A applying axial pressure along motor 100, and surface of contact 1C ' and 1D ' is extruded each other.

Screw 15 can transmit the moment of torsion determined between parts 1C and 1D.

But in motor described herein, due to diameter and/or the limited amount of screw 15, it can not transmit enough moments of torsion between parts 1C and 1D.

And in order to increase the torque value transmitted between parts 1C and 1D, surface of contact 1C ' becomes the specific subject arranged.Surface of contact 1C ' is through the shot peening after Surface hardening treatment.As the result of these process, face 1C ' has become coarse and has become the friction surface that can transmit sizable moment of torsion between parts 1C and 1D.

Figure 3 illustrates motor part according to a second embodiment of the present invention.

In this embodiment, the first assembly according to the present invention not only comprises parts 1C, and comprises other parts, particularly mounting plate 22.These other parts are used for transmitting torque between parts 1C and 1D.This plate 22 is the packing rings arranged around the spin axis A of this device (motor 100).At this, packing ring is set to substantially flat parts, is equipped with the hole entered for another parts.

(it should be noted, mounting plate also can adopt the form of the packing ring in this embodiment, and wherein mounting plate only comprises rough surface on one side thereof).

The both sides relative with plate 22 all have coarse friction surface (24,25).Plate 22 inserts between surface of contact 1C ' and 1D ', and friction surface 24 is contacted with 1D ' with surface of contact 1C ' respectively with 25.At surface 24 and the horizontal plane place of 1D ', the first assembly (parts 1C and plate 22) contacts with the second assembly (parts 1D), surperficial 24 and 1D ' form the first surface of contact and the second surface of contact according to the present invention.Surface 1C ' and 25 forms the 3rd surface of contact and the 4th surface of contact according to the present invention.

In the embodiment of fig. 2, friction surface 24 and 25 aligns vertically on every side of mounting plate 22.In fact, friction surface 24 and 25 accurately extends to the right each other vertically on every side of plate 22.

Fig. 2 A by the form that friction surface 24,25 is shown better understands the technique effect of plate 22.

Multiple protuberances on described friction surface or at least one of described friction surface (24,25) are sharp; Their formation spikes or tip 26(are along the cross-section perpendicular to the plane of plate).When parts 1C, 22 and 1D assembled and when being placed under axial pressure by screw 15, tip 26 is pressed into (being surperficial 1C ' and 1D ' in this case) in relative contact surface; Their peventing member 1C, any rotation between 22 and 1D, any relative sliding.

And in an illustrated embodiment, the surface hardness of parts 1C and 1D is less than the surface hardness of plate 22.And when motor is assembled, the screw 15 that this plate is touched between face 1C ' and 1D ' clamps.As needs, can specific extrusion system be used (alternatively) to be applied on mounting plate by pressure strong especially.Under the effect of the pressure, tip 26 therefore (relatively shallowly) through parts 1C and 1D.And after mounting, the thickness in fact occupied by the plate 22 between surface of contact is less than its original depth substantially, and be about the minimum thickness (thickness e, Fig. 2 A) of the plate measured at the bottom place of the concaveconvex structure of friction surface.In fact, for the packing ring of thickness with about 1mm, the thickness loss of about 0.1 to 0.3mm can be determined between erecting stage.

When installing by this way, plate 22 is closely connected to parts 1C and 1D, and can transmit very large moment of torsion each other in these parts.And, advantageously, during the maintenance operation of device, the present invention can be implemented by repacking on new device.

In order to embed mounting plate 22, the second surface of contact and/or the 3rd surface of contact (1C ', 1D ') can be set to have the accommodating recess (uptakerecess) 28 for plate, and this accommodating recess is set to receive mounting plate 22.(it should be noted that, can arrange so accommodating recess for this plate in one embodiment, wherein this mounting plate only has coarse surface in side).

Different structures is also feasible.

In the second embodiment and the 3rd embodiment (Fig. 4 to Fig. 8), recess 28 is arranged on the 1D ' of face, and face 1C ' keeps smooth.This is also the situation in the modification illustrated in figure 9 a.In this way, the second surface of contact and the 3rd surface of contact kind only one (1D ') comprises the accommodating recess 28 for plate, and another surface of contact 1C ' arranges a recess.

On the contrary, in the modification shown in Fig. 9 B, the accommodating recess 30,31 of plate is arranged symmetrically on two surface of contact 1C ' and 1D '.In this configuration, seal joints is arranged between two face 1C ' and 1D ' symmetrically.

If plate 22 provides clear and definite gain in moment of torsion transmission, then usually also must form specific arrangement to guarantee the sealing of the connection between parts 1C and 1D.In fact need to prevent any fluid from motor 100 internal leak between parts 1C and 1D to outside.

In order to ensure sealing, device 100 comprise seal arrangement 40 with two surface of contact preventing from contacting with each other (1C ', 25; 24,1D ') between fluid be radially communicated with.

These devices can adopt various ways.In the example shown in Fig. 3, Fig. 4, Fig. 5 and Fig. 6, seal arrangement 40 comprise be arranged on packing ring 22 every side on and two O type rings 42,43 coaxial with packing ring 22.These joining portion extend to the right of surface of contact continuously in the whole outer rim of motor, and prevent any fluid between face 1C ' and 1D ', entering into motor outside from the inside of motor.They guarantee Continuous Contact between face 1C ' and plate 22 on the one hand, guarantee the Continuous Contact between plate 22 and face 1D ' on the other hand.

And plate 22 has the sealing surfaces towards joining portion 42,43, namely, the surface of sealing can be formed when joining portion 42,43 is extruded on the sealing surface.In the case, these surfaces are the smooth surfaces in the inner circumferential of the plate 22 be arranged on every side at joining portion.

In another embodiment, illustrated by Fig. 7 and Fig. 8, seal arrangement 40 comprises respectively at packing ring 22(such as, post forming) both sides on fixing two joining portion 44,45.The installation of plate 22 to be simplified to by packing ring and to make two joining portion be reliable degree by this embodiment.

Being arranged on one or more seal joints in seal arrangement 40 can by with different structure installation.

In one embodiment, seal arrangement (40) comprising: at least one seal joints (42,43,46), is set to form sealing between two plat surface; And groove 50, to be formed in surface of contact 1D ' and to be set to receive described seal joints 46, and allowing seal joints 46 to be out of shape.

Such as, in figure 9 a, joining portion 46 is set to form sealing on the 1C ' of face.Face 1D ' comprises the groove 50 be set to for receiving joining portion 46.In such configuration, plate 22 contributes to keeping joining portion 46, and groove 50 is more shallow.

In expression above, term " plat surface " represents such plat surface especially: do not have concaveconvex structure against the sealing of described plat surface joining portion, described plat surface may seal to improve with engaging portion contacts.In this way, this surface (described plat surface) advantageously generates sealing, does not need specific process (as machining).

In one embodiment, seal arrangement 40 comprises the joining portion 46,47 be inserted between the second surface of contact 1D ' and the 3rd surface of contact 1C ', and these joining portion 46,47 are arranged to directly contact with each of these faces.

In the case, this joining portion radially can be placed on inner side or the outside of packing ring.Therefore, have between the sealing function guaranteed by joining portion with the special moment of torsion propagation function guaranteed by plate 22 and be separated (dissociation).

An one exemplary embodiment is given in Fig. 9 A and Fig. 9 B.In these figures, the sealing between parts 1C and the 1D guaranteeing housing by the O type ring be located between surperficial 1C ' and 1D ' in a conventional manner.Joining portion in the case is radially placed on the inner side of plate 22, and is independently relative to plate 22.Advantageously, the edge of packing ring 22 is used to keep joining portion (46,47).

The present invention is described to the motor with radial piston in the preceding article.Certainly, the present invention can be implemented as the hydraulic pressure installation of multiple other types, especially has the pump of axial piston.

Now repeatedly test to verify effect of the present invention.What can determine is, when retaining washer is as shown in Figure 3 inserted between two elements to be fixed, the Maximum Torque can transmitted between two elements of oil hydraulic motor can be three times original (such as increasing to 27500Nm from 9000Nm).

Claims

1. a hydraulic pressure installation (100), comprising: the first assembly, and it comprises housing parts (1C), is provided with cylinder body (2) in this housing parts; And second assembly, be fixed to described first assembly,

Described first assembly and the second assembly have respectively the first surface of contact and the second surface of contact (1C ', 1D '), described first surface of contact and the second surface of contact are extruded toward each other by the device (15) applying axial pressure and are settled with being contacted with each other

The feature of this hydraulic pressure installation is, described first surface of contact and the second surface of contact one of at least there is coarse friction surface (24,25), in order to transmit high moment of torsion between two described assemblies.

2. hydraulic pressure installation according to claim 1, wherein said first assembly also comprises mounting plate (22);

Described first surface of contact (24) and the second surface of contact (1D ') be respectively formed on the wall relative with described second assembly with described mounting plate;

And, the wall relative with described mounting plate with described housing parts is formed the 3rd surface of contact (1C ') and the 4th surface of contact (25) respectively; And

One of them of described 3rd surface of contact and the 4th surface of contact has coarse friction surface (25), in order to transmit high moment of torsion between described housing parts and described mounting plate.

3. hydraulic pressure installation according to claim 2, wherein on every side of this mounting plate (22), described friction surface (24,25) aligns vertically.

4. hydraulic pressure installation according to claim 2, wherein this second surface of contact and/or the 3rd surface of contact have the accommodating recess (28) for plate, and this accommodating recess is set to receive this mounting plate (22).

5. hydraulic pressure installation according to claim 4, wherein only this second surface of contact and the 3rd surface of contact one of them (1D ') comprises the accommodating recess for this plate, another surface of contact (1C ') be provided with a recess.

6. hydraulic pressure installation according to claim 2, wherein this plate (22) is the packing ring arranged around the spin axis (A) of this hydraulic pressure installation.

7. hydraulic pressure installation according to claim 1, one of them of wherein said friction surface or described friction surface (24,25) has the roughness index Ra that is greater than 12 μm or is greater than the roughness index Rz of 80 μm.

8. hydraulic pressure installation according to claim 1, the protuberance wherein at least one of described friction surface or described friction surface (24,25) is sharp.

9. hydraulic pressure installation according to claim 1, at least one in wherein said friction surface or described friction surface (24,25) has the Vickers hardness being greater than 450HV.

10. hydraulic pressure installation according to claim 1, and a surface of contact wherein staggered relatively with a friction surface (24,25) (1C ', 1D ') there is the surface hardness being less than this friction surface.

11. hydraulic pressure installation according to claim 1, wherein this hydraulic pressure installation comprises seal arrangement (40), in order to prevent from contacting with each other two surface of contact (1C ', 25; 24,1D ') between radial fluid be communicated with.

12. hydraulic pressure installation according to claim 11, wherein sealing device (40) comprises at least one seal joints (42,43,46), described seal joints is set to be formed between a plane and groove (50) seal, this groove (50) to be formed in surface of contact (1D ') and to be set to receive described seal joints (46), and allows described seal joints (46) to be out of shape.

13. hydraulic pressure installation according to claim 2, wherein this hydraulic pressure installation comprises seal arrangement (40), in order to prevent from contacting with each other two surface of contact (1C ', 25; 24,1D ') between radial fluid be communicated with, and sealing device (40) comprises joining portion (46,47), this joining portion (46,47) to be plugged between this second surface of contact with the 3rd surface of contact and to be placed as and all directly contacts with these faces.

The manufacture method of 14. 1 kinds of hydraulic pressure installation, comprises the following steps:

A) first assembly and the second assembly are provided, make:

-two described assemblies can be fixed to one another, to form hydraulic pressure installation (100);

-two described assemblies have the first surface of contact and the second surface of contact (1C ', 1D ') respectively;

-this first assembly comprises housing parts (1C), is provided with cylinder body (2) in this housing parts;

D) two described assemblies are assembled, to be settled with contacting with each other by two surface of contact by the device (15) applying axial pressure;

The method is characterized in that, it is further comprising the steps of b):

B) described surface of contact one of them on form coarse friction surface (24,25), to allow to transmit high moment of torsion between two described assemblies.

15. manufacture methodes as claimed in claim 14, also comprise step b) after step c):

C) perform for increasing the surface treatment of the surface hardness of friction surface, the surface hardness of the surface of contact that makes relatively to place with described friction surface (24,25) (1C ', 1D ') is less than the surface hardness of this friction surface.