CN207048962U - Swash plate, swash plate plunger pump and Hydraulic Power Transmission System - Google Patents

Abstract

The utility model discloses a kind of swash plate, swash plate plunger pump and Hydraulic Power Transmission System, is related to hydraulic plunger pump technical field.The swash plate includes disk body, and the side of disk body is provided with the first oil groove and the second oil groove, and opposite side is provided with the 3rd oil groove and the 4th oil groove.First oil groove is connected by first throttle oil duct with the 3rd oil groove, and the second oil groove is connected by the second throttling oil duct with the 4th oil groove.Swash plate plunger pump includes shell body, support plate, plunger assembly and swash plate.Swash plate is embedded at shell body, and support plate offers throttle orifice and is arranged at the top of swash plate, and plunger assembly is arranged at the top of support plate.Shell body is provided with the first oil circuit and the second oil circuit, and the first oil circuit is connected with the 3rd oil groove, and the second oil circuit is connected with the 4th oil groove.The swash plate plunger pump is ingenious in design, simple in construction, produces, be easily manufactured, changing the static pressure supporting construction of plunger pump by changing friction type, so as to reduce noise, reduces production cost.

Description

Swash plate, swash plate plunger pump and Hydraulic Power Transmission System

Technical field

The utility model is related to hydraulic plunger pump technical field, in particular to a kind of swash plate, swash plate plunger pump and Hydraulic Power Transmission System.

Background technology

Plunger pump is an important device of hydraulic system.It is moved back and forth by plunger in cylinder body, makes seal operation The volume of cavity volume changes to realize oil suction, force feed, is widely used in the field that high pressure, big flow and flow need to adjust Close, in such as hydraulic press, engineering machinery and ship.

Axial plunger pump be using the plunger parallel with power transmission shaft moved back and forth in plunger hole caused by volume change Come what is be operated.Existing inclined disc type hydraulic axial plunger pump, typically there are two kinds of structure shapes between its variable swash plate and housing Formula, a kind of is that the slideway between housing and swash plate is supported by cylindrical roller half-and-half bearing, is also easy to produce mechanical oscillation, is made an uproar during work Sound is larger.Another kind is by setting up swash plate seat between housing and variable swash plate, hydraulic oil is introduced in swash plate seat, by oblique Oil film is established on slideway between disk and swash plate seat, reaches support effect, this construct noise decreases, but is not suitable for height Operating mode is pressed, and it is complicated, difficulty of processing is big.

Therefore, a kind of reduction noise how is designed, cost, and axial plunger pump simple in construction is reduced, is this area Technical staff's technical problem urgently to be resolved hurrily.

Utility model content

The purpose of this utility model is to provide a kind of swash plate, reasonable in design, simple in construction, produces, be easily manufactured, passing through Change the form of friction, reduce noise.

The purpose of this utility model, which also resides in, provides a kind of swash plate plunger pump, includes above-mentioned swash plate, passes through change Friction type changes the static pressure supporting construction of plunger pump, so as to reduce noise, reduces production cost.

The purpose of this utility model, which also resides in, provides a kind of Hydraulic Power Transmission System, has having for above-mentioned swash plate plunger pump Beneficial effect.

What embodiment of the present utility model was realized in：

Based on above-mentioned purpose, embodiment of the present utility model provides a kind of swash plate, described for being arranged on plunger pump Swash plate includes disk body；

The disk body includes relative the first face and the second face, and first face is provided with the first oil groove and the second oil Groove, second face are provided with the 3rd oil groove and the 4th oil groove；

First oil groove is corresponding with the 3rd oil groove and is connected by first throttle oil duct, second oil groove with 4th oil groove is corresponding and is connected by the second throttling oil duct.

In addition, the swash plate provided according to embodiment of the present utility model, can also have technical characteristic additional as follows：

In optional embodiment of the present utility model, the swash plate also includes sliding positioned at the first of the disk body both sides Road and the second slideway, first slideway is corresponding with first oil groove and the 3rd oil groove respectively, second slideway It is corresponding with second oil groove and the 4th oil groove respectively.

In optional embodiment of the present utility model, first slideway and second slideway are relative to the disk sheet Body is symmetrical and first slideway and second slideway are circular arc slideway.

In optional embodiment of the present utility model, the first face of the disk body open up it is fluted, the groove Bottom offers through hole, and first oil groove and second oil groove may be contained within the bottom of the groove and be located at the through hole Circumference.

It is of the present utility model that embodiment further provides a kind of swash plate plunger pump, including shell body, support plate, plunger group Part and swash plate；

The shell body includes shell side wall and the shell bottom wall to match with the swash plate, and the swash plate is embedded at the shell bottom Wall, the support plate offers throttle orifice and the support plate be arranged at the swash plate the remote shell bottom wall one end, institute State the side that plunger assembly is arranged at the remote swash plate of the support plate；

The plunger assembly includes plunger and piston shoes, and being not provided with the plunger and the piston shoes can be with described The center throttle orifice that one oil groove connects with second oil groove, prevent the hydraulic oil on the swash plate from by the piston shoes and institute State plunger；

The shell body is provided with the first oil circuit and the second oil circuit extended from the shell side wall to the shell bottom wall, described First oil circuit is connected with the 3rd oil groove of the swash plate, and second oil circuit is connected with the 4th oil groove of the swash plate, uses In making hydraulic oil the first oil film is formed between the swash plate and the shell body.

In optional embodiment of the present utility model, the throttle orifice includes first segment discharge orifice and the second throttle orifice, institute State first segment discharge orifice it is corresponding with first oil groove and connect, second throttle orifice it is corresponding with second oil groove and connection, For making hydraulic oil form the second oil film between the plunger assembly and the support plate.

In optional embodiment of the present utility model, the quantity of the first segment discharge orifice and second throttle orifice is Multiple, the circumference of the first segment discharge orifice and second throttle orifice along the support plate is uniformly arranged.

In optional embodiment of the present utility model, the throttle orifice includes first step hole and second step hole, institute The diameter for stating first step hole is more than the diameter in the second step hole, and the second step hole position is in the first step hole Bottom and along the support plate thickness direction penetrate.

In optional embodiment of the present utility model, the swash plate plunger pump also includes end cap, and the end cap covers In the shell body, the end cap includes the 3rd oil circuit and the 4th oil circuit, and the 3rd oil circuit can connect with first oil circuit Logical, the 4th oil circuit can be with second oil communication；

The swash plate plunger pump can be introduced the first hydraulic oil of the end cap by the 3rd oil circuit described oblique The 3rd oil groove of disk, the second hydraulic oil of the end cap can be introduced by the 4th oil circuit described in the swash plate 4th oil groove.

It is of the present utility model that embodiment further provides a kind of Hydraulic Power Transmission System, including above-mentioned swash plate plunger pump.

The beneficial effect of the utility model embodiment is：It is reasonable in design, simple in construction, produce, be easily manufactured, by changing Become friction type to change the static pressure supporting construction of plunger pump, so as to reduce noise, reduce production cost, it is applied widely, it is real It is preferable with property.

Brief description of the drawings

, below will be to required in embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment The accompanying drawing used is briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore The restriction to scope is not construed as, for those of ordinary skill in the art, is not paying the premise of creative work Under, other related accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is the schematic diagram at the first visual angle of the swash plate that the utility model embodiment 1 provides；

Fig. 2 is the schematic diagram at Fig. 1 the second visual angle；

Fig. 3 is Fig. 2 sectional view；

Fig. 4 is the schematic diagram for the swash plate plunger pump that the utility model embodiment 2 provides；

Fig. 5 is the schematic diagram of support plate in Fig. 4；

Fig. 6 is Fig. 5 sectional view.

Icon：100- swash plate plunger pumps；10- swash plates；103- disk bodies；The slideways of 105- first；The slideways of 108- second； The oil grooves of 112- first；The oil grooves of 114- second；The oil grooves of 115- the 3rd；The oil grooves of 116- the 4th；122- first throttle oil ducts；124- second Throttle oil duct；20- end caps；22- shell bodies；The oil circuits of 223- first；The oil circuits of 225- second；24- support plates；242- first throttles Hole；The throttle orifices of 246- second；26- plunger assemblies.

Embodiment

To make the purpose, technical scheme and advantage of the utility model embodiment clearer, below in conjunction with this practicality Accompanying drawing in new embodiment, the technical scheme in the utility model embodiment is clearly and completely described, shown So, described embodiment is a part of embodiment of the utility model, rather than whole embodiments.

Therefore, below the detailed description of the embodiment of the present utility model to providing in the accompanying drawings be not intended to limit will The scope of the utility model of protection is sought, but is merely representative of selected embodiment of the present utility model.Based on the utility model In embodiment, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made Mode, belong to the scope of the utility model protection.

It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.

, it is necessary to which explanation, term " first ", " second ", " the 3rd " etc. are only used for area in description of the present utility model Divide description, and it is not intended that instruction or hint relative importance.

In description of the present utility model, it is also necessary to which explanation, unless otherwise clearly defined and limited, term " are set Put ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this Concrete meaning in utility model.

Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing, but the utility model can be by weighing Profit requires to limit and the multitude of different ways of covering is implemented.

Wherein Fig. 1-Fig. 3 corresponds to embodiment 1 of the present utility model, and Fig. 4-Fig. 6 corresponds to embodiment party of the present utility model Formula 2, the technical scheme of the utility model embodiment is described in detail below in conjunction with accompanying drawing.

Embodiment 1

As shown in Figure 1, Figure 2 and Figure 3, the swash plate 10 that the utility model embodiment 1 provides is used to be arranged on plunger pump, should Swash plate 10 includes disk body 103 and the first slideway 105 and the second slideway 108 positioned at the both sides of disk body 103.

The concrete structure and mutual corresponding relation of all parts of the swash plate 10 are described in detail below.

Disk body 103 includes relative the first face and the second face, wherein, the first face is provided with the first separate oil groove 112 and second oil groove 114, the first oil groove 112 is corresponding with the first slideway 105, and the second oil groove 114 is relative with the second slideway 108 Should, the first oil groove 112 does not connect with the second oil groove 114.

Second face is provided with separate the 3rd oil groove 115 and the 4th oil groove 116, and the 3rd oil groove 115 is also slided with first Road 105 is corresponding, and the 4th oil groove 116 is corresponding with the second slideway 108, meanwhile, the 3rd oil groove 115 and the 4th oil groove 116 do not connect It is logical.

Optionally, disk body 103 is additionally provided with the throttling oil duct 124 of first throttle oil duct 122 and second of insertion, first segment The both ends of stream oil duct 122 connect correspondingly with the first oil groove 112 and the 3rd oil groove 115 respectively, the second throttling oil duct 124 Both ends connect correspondingly with the second oil groove 114 and the 4th oil groove 116 respectively.

Optionally, the first slideway 105 and the second slideway 108 are circular arc slideway, and the slideway of the first slideway 105 and second 108 are symmetrical arranged relative to disk body 103, and the of the arc surface of the slideway 108 of the first slideway 105 and second and disk body 103 Two faces are located at phase homonymy, specifically, the first slideway 105 is corresponding with the first oil groove 112 and the 3rd oil groove 115 respectively, second slides Road 108 is corresponding with the second oil groove 114 and the 4th oil groove 116 respectively.

In embodiment 1 of the present utility model, the first face of disk body 103 opens up fluted, and the groove is tied to be circular Structure, through hole is offered in the bottom of the groove, i.e. through hole is located at the center of circular configuration so that the center line of groove is with leading to The center line in hole overlaps.

Optionally, the first oil groove 112 and the second oil groove 114 are respectively arranged at the bottom of groove and are located at the circumference of through hole, In embodiment 1 of the present utility model, the first oil groove 112 and the second oil groove 114 extend internally from bottom portion of groove, and first The oil groove 114 of oil groove 112 and second is symmetrical relative to through hole.

In embodiment 1 of the present utility model, the first slideway 105 of definition is high pressure slideway, and the second slideway 108 is low pressure Slideway, after the swash plate 10 is arranged in plunger pump, the first face of the swash plate 10 is above, under the second face of swash plate 10 is located at Side so that the high pressure slideway and low pressure slideway of swash plate 10 can be engaged with high pressure slideway, the low pressure slideway of plunger pump shell.

Optionally, it is high pressure sump to define first oil groove 112 corresponding with the high pressure slideway and the 3rd oil groove 115, Second oil groove 114 corresponding with the low pressure slideway and the 4th oil groove 116 are low-pressure tank.

First throttle oil duct 122 connects the first oil groove 112 and the 3rd oil groove 115, therefore the first throttle oil duct 122 is also height Road is pressed oil, the second throttling oil duct 124 connects the second oil groove 114 and the 4th oil groove 116, therefore the second throttling oil duct 124 is low pressure Oil duct.

In the utility model embodiment 1, the structure of the first throttle oil duct 122 and second throttling oil duct 124 can be with It is identical, can also be different, for the ease of production, the first throttle oil duct 122 is identical with the structure of the second throttling oil duct 124, tool Body structure is as follows.

By taking first throttle oil duct 122 as an example, the first throttle oil duct 122 includes the first oil pocket and the second oil pocket of insertion, First oil pocket and the first oil groove 112 connect, and the second oil pocket and the 3rd oil groove 115 connect, and the diameter dimension of the first oil pocket is less than the The diameter dimension of two oil pockets, and the axis of the first oil pocket overlaps with the axis of the second oil pocket.

The swash plate 10 that embodiment 1 of the present utility model provides, it is simple in construction, the oil discharge outlet of plunger pump can be introduced High-pressure oil flow is to the bottom of swash plate 10, so as to establish oil film between swash plate 10 and plunger pump shell so that swash plate 10 is by plunger group The power of part 26 can reach balance with the upward power of swash plate 10, reduce between the cambered way of plunger pump shell and swash plate 10 Frictional force, effectively reduce noise.

The swash plate 10 that the utility model embodiment 1 provides has an advantageous effect in that：It is ingenious in design, it is simple in construction, it is raw Produce, be simple to manufacture, it is easy to process, hydraulic oil and low pressure oil are guided to the upper surface of swash plate 10 by the structure of the swash plate 10, So as to form static pressure support to plunger assembly 26, the form of friction is changed, reduces noise.

Embodiment 2

The utility model embodiment 2 provides a kind of swash plate plunger pump 100, refer to shown in Fig. 4, including end cap 20th, the swash plate 10 that shell body 22, support plate 24, plunger assembly 26 and embodiment 1 provide, is described as follows：

The shell body 22 includes shell side wall and shell bottom wall, wherein, shell side wall encloses an accommodating chamber, and shell bottom with shell bottom wall Wall is the cambered way to match with the second face of swash plate 10 so that swash plate 10 can be embedded at the shell bottom wall, and support plate 24 is set One end of the remote shell bottom wall of swash plate 10 is placed in, i.e. support plate 24 is arranged at the top in the face of swash plate 10 first, and plunger assembly 26 is set The side of the remote swash plate 10 of support plate 24 is placed in, i.e. the plunger assembly 26 is arranged at the top of support plate 24, and end cap 20 is set In the side of the remote support plate 24 of plunger assembly 26, i.e., the end cap 20 is fastened and is arranged on shell body 22.

Optionally, shell body 22 is provided with the first oil circuit 223 and the second oil circuit 225 extended from shell side wall to shell bottom wall, Wherein, the first oil circuit 223 is connected with the 3rd oil groove 115 of swash plate 10, the 4th oil groove 116 of the second oil circuit 225 and swash plate 10 It is connected, in embodiment 2 of the present utility model, it is high-pressure oil passage to define the first oil circuit 223, and the second oil circuit 225 is low pressure Oil circuit, by the first oil circuit 223 and the second oil circuit 225, the hydraulic oil that the oil discharge outlet of the swash plate plunger pump 100 can be introduced Or low pressure oil is inducted into the 3rd oil groove 115 and the 4th oil groove 116 of swash plate 10, so that hydraulic oil is in swash plate 10 and shell The first oil film is formed between body 22.

It refer to shown in Fig. 5 and Fig. 6, optionally, the throttle orifice with the oil communication of swash plate 10 offered in support plate 24, The throttle orifice includes the throttle orifice 246 of first segment discharge orifice 242 and second, and the first segment discharge orifice 242 is corresponding with the first oil groove 112, and First segment discharge orifice 242 connects with the first oil groove 112, the second throttle orifice 246 and 114 corresponding and the second throttle orifice 246 of the second oil groove Connected with the second oil groove 114, be easy to the oil circuit of swash plate 10 can be incorporated into the plunger assembly 26 of the top of support plate 24, so that Obtain hydraulic oil and the second oil film is formed between plunger assembly 26 and support plate 24.

In embodiment 2 of the present utility model, the quantity of the throttle orifice 246 of first segment discharge orifice 242 and second be it is multiple, Structure and size all same, circumference of the throttle orifice 246 of first segment discharge orifice 242 and second along support plate 24 are uniformly distributed setting.

Specifically, the throttle orifice includes first step hole and second step hole, the diameter in first step hole is more than second The diameter in rank hole, second step hole position penetrate setting in the bottom in first step hole and along the thickness direction of support plate 24, wherein During assembling, first step hole is set close to swash plate 10, and second step hole is set close to plunger assembly 26.

Wherein, plunger assembly 26 includes plunger and piston shoes, and in assembling, piston shoes are closer to support plate 24 relative to plunger Set, being not provided with embodiment 2 of the present utility model, on plunger and piston shoes can be with the first oil groove of swash plate 10 112 or the second center throttle orifice that connects of oil groove 114 so that after the hydraulic oil on swash plate 10 flow to support plate 24, it is impossible to logical Cross piston shoes or plunger.

Optionally, end cap 20 is used to cover in the top of shell body 22, and end cap 20 includes the 3rd oil circuit and the 4th oil circuit, the Three oil circuits can connect with the first oil circuit 223, and the 4th oil circuit can connect with the second oil circuit 225, and it is high pressure to define the 3rd oil circuit Oil circuit, the 4th oil circuit is low pressure oil way, and in embodiment of the present utility model, high-pressure oil passage does not connect with low pressure oil way, phase It is mutually independent.

The operation principle for the swash plate plunger pump 100 that embodiment 2 of the present utility model provides is：

Hydraulic oil is incorporated into the first oil circuit 223 of shell body 22 by the 3rd oil circuit by 20 on high-tension side hydraulic oil of end cap, Hydraulic oil is guided to the 3rd oil groove 115 of swash plate 10 from the first oil circuit 223, by first throttle oil duct 122 by the 3rd oil groove 115 Interior hydraulic oil is introduced in the first oil groove 112, so as to form the first oil film between swash plate 10 and the shell bottom wall of shell body 22, So as to produce static pressure support, hydraulic oil is introduced to plunger assembly 26 by the first segment discharge orifice 242 in support plate 24, so as in post The second oil film is formed between the piston shoes face of plug assembly 26 and support plate 24, plays the purpose of static pressure support.

Similarly, the oil circuit flow direction of the hydraulic oil of the low-pressure side of end cap 20 is identical with high-pressure side, and difference is on high-tension side oil circuit In be hydraulic oil, be low pressure oil in the oil circuit of low-pressure side, low-pressure side also can between swash plate 10 and the shell bottom wall of shell body 22 shape Into the first oil film, the second oil film is formed between the piston shoes face of plunger assembly 26 and support plate 24.

This swash plate plunger pump 100 arrive the bottom of swash plate 10 by introducing high pressure liquid force feed at oil discharge outlet, in swash plate 10 and Oil film is established between shell body 22 so that the power downward to swash plate 10 of high-pressure plunger component 26 and the upward power of swash plate 10 reach flat Weighing apparatus, reduces the frictional force between the cambered way of shell body 22 and swash plate 10, effectively reduces noise, meanwhile, by low pressure Oil is incorporated into cambered way and the bottom of swash plate 10 of shell body 22 from the low-pressure side of end cap 20, between swash plate 10 and shell body 22 Establish oil film so that the low-pressure plunger component 26 of oil sucting cavity and the area of low pressure stress balance of swash plate 10, form decompression support knot Structure, cost is reduced, change existing friction type, effectively reduce noise.

The swash plate plunger pump 100 is reasonable in design, simple in construction, produces, be easily manufactured, being changed by changing friction type Become the static pressure supporting construction of plunger pump, so as to reduce noise, reduce production cost, there is preferable market promotion prospect.

Embodiment 3

The utility model embodiment 3 provides a kind of Hydraulic Power Transmission System, including the swash plate that above-mentioned embodiment 2 provides Formula plunger pump 100, is described as follows：

The swash plate plunger pump 100 can realize high pressure, high speed and big flow, and the swash plate plunger pump 100 can It is widely used in the fields such as engineering machinery, lifting transport, metallurgical, ship and aviation.

The swash plate plunger pump 100 is employed due to oil distribution casing and cylinder body, piston shoes and plunger these two pair high-speed motion pair One hydrostatic support, eliminate Large Copacity thrust bearing, have it is compact-sized, part is few, and good manufacturability, cost is low, small volume, weight The advantages of amount is light, and radial dimension is small, and rotary inertia is small, therefore rotating speed is higher.

It should be noted that in the case where not conflicting, the feature in embodiment in the utility model can be mutual With reference to.

Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for For those skilled in the art, the utility model can have various modifications and variations.It is all in spirit of the present utility model and former Within then, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.

Claims (10)

1. a kind of swash plate (10), for being arranged on plunger pump, it is characterised in that the swash plate (10) includes disk body (103)；

The disk body (103) includes relative the first face and the second face, and first face is provided with the first oil groove (112) and Two oil grooves (114), second face are provided with the 3rd oil groove (115) and the 4th oil groove (116)；

First oil groove (112) is corresponding with the 3rd oil groove (115) and is connected by first throttle oil duct (122), institute State the second oil groove (114) it is corresponding with the 4th oil groove (116) and by second throttling oil duct (124) connect.

2. swash plate (10) according to claim 1, it is characterised in that the swash plate (10) also includes being located at the disk body (103) the first slideway (105) and the second slideway (108) of both sides, first slideway (105) respectively with first oil groove (112) and the 3rd oil groove (115) is corresponding, second slideway (108) respectively with second oil groove (114) and described 4th oil groove (116) is corresponding.

3. swash plate (10) according to claim 2, it is characterised in that first slideway (105) and second slideway (108) symmetrical relative to the disk body (103) and first slideway (105) and second slideway (108) are circular arc Slideway.

4. swash plate (10) according to claim 1, it is characterised in that the first face of the disk body (103) offers recessed Groove, the bottom of the groove offer through hole, and first oil groove (112) and second oil groove (114) may be contained within described The bottom of groove and the circumference for being located at the through hole.

5. a kind of swash plate plunger pump (100), it is characterised in that including shell body (22), support plate (24), plunger assembly (26) And the swash plate (10) described in claim 1-4 any one；

The shell body (22) includes shell side wall and the shell bottom wall to match with the swash plate (10), and the swash plate (10) is embedded at The shell bottom wall, the support plate (24) offers throttle orifice and the support plate is arranged at the remote described of the swash plate (10) One end of shell bottom wall, the plunger assembly (26) are arranged at the side of the remote swash plate (10) of the support plate (24)；

The plunger assembly (26) includes plunger and piston shoes, and being not provided with the plunger and the piston shoes can be with described The center throttle orifice that one oil groove (112) connects with second oil groove (114), prevent the hydraulic oil on the swash plate (10) from leading to Cross the piston shoes and the plunger；

The shell body (22) is provided with the first oil circuit (223) and the second oil circuit extended from the shell side wall to the shell bottom wall (225), first oil circuit (223) is connected with the 3rd oil groove (115) of the swash plate (10), second oil circuit (225) It is connected with the 4th oil groove (116) of the swash plate (10), for making hydraulic oil in the swash plate (10) and the shell body (22) the first oil film is formed between.

6. swash plate plunger pump (100) according to claim 5, it is characterised in that the throttle orifice includes first throttle Hole (242) and the second throttle orifice (246), the first segment discharge orifice (242) is corresponding with first oil groove (112) and connects, institute State the second throttle orifice (246) it is corresponding with second oil groove (114) and connect, for making hydraulic oil in the plunger assembly (26) The second oil film is formed between the support plate (24).

7. swash plate plunger pump (100) according to claim 6, it is characterised in that the first segment discharge orifice (242) and institute The quantity for stating the second throttle orifice (246) is multiple, and the first segment discharge orifice (242) and second throttle orifice (246) are along institute The circumference for stating support plate (24) is uniformly arranged.

8. the swash plate plunger pump (100) according to claim 5-7 any one, it is characterised in that the throttle orifice bag Including first step hole and second step hole, the diameter in the first step hole is more than the diameter in the second step hole, and described the Two stepped holes are located at the bottom in the first step hole and penetrated along the thickness direction of the support plate (24).

9. swash plate plunger pump (100) according to claim 5, it is characterised in that the swash plate plunger pump (100) is also Including end cap (20), the end cap (20) is covered on the shell body (22), and the end cap (20) includes the 3rd oil circuit and the 4th Oil circuit, the 3rd oil circuit can connect with first oil circuit (223), and the 4th oil circuit can be with second oil circuit (225) connect；

First hydraulic oil of the end cap (20) can be introduced institute by the swash plate plunger pump (100) by the 3rd oil circuit The 3rd oil groove (115) of swash plate (10) is stated, can be by the second hydraulic oil of the end cap (20) by the 4th oil circuit Introduce the 4th oil groove (116) of the swash plate (10).

10. a kind of Hydraulic Power Transmission System, it is characterised in that including the swash plate plunger pump described in claim 5-9 any one (100)。