CN110537021A

CN110537021A - Vane pump

Info

Publication number: CN110537021A
Application number: CN201880026175.6A
Authority: CN
Inventors: 下口保; 大后富男
Original assignee: Corporate Clubs Are Same As Vietnam
Current assignee: Corporate Clubs Are Same As Vietnam
Priority date: 2017-04-22
Filing date: 2018-04-17
Publication date: 2019-12-03
Anticipated expiration: 2038-04-17
Also published as: WO2018194042A1; JPWO2018194042A1; CN110537021B; JP6773991B2

Abstract

A kind of vane pump is provided, high pressure and low pressure both pressure oils can be sprayed, and also can promptly be started.The vane pump has: the pump housing (2) with suction inlet (30)；Stator (3)；Rotor (4)；Multiple blades (6)；1st side plate (7) of the ejection side of the end surface side and oil that configured in stator (3)；2nd side plate (8) of the other end surface side and the suction side of oil that configured in stator (3)；And the ejiction opening (40,41) of the oil at position and the pump cover (10) engaged with the pump housing (2) there are two tools, a pair of of back pressure slot (70,71,80,81) are formed in rotor (4) side of the 1st side plate and the 2nd side plate (7,8), back pressure slot (70) is arranged to, the 1st back pressure slot (70A), the slot length 2nd back pressure slot (70B) shorter than its and by the connection of two back pressure slots (70A, 70B) and most narrow the 3rd back pressure slot (70C) of groove width.

Description

Vane pump

Technical field

The present invention relates to a kind of inflow and outflows by control oil to be loaded in the automatic change of automobile, industrial vehicle The balanced impeller pump of the clutch control of fast device etc..

Background technique

In the past, in the vane pump for the automatic transmission for being used in automobile, it is located in engine stop and (turns than rotary shaft Son) blade of position against the top is contained in the blade groove of rotor outer periphery due to its self weight.

In addition, the blade for being located at the position than rotor on the lower stretches out downwards from blade groove, with the periphery for being located at blade Stator contact.

Therefore, if rotor starts to rotate (if blade pump startup), blade is accommodated again along with the rotation of rotor After in blade groove, the blade until being temporarily contained in blade groove needs the regular hour until stretching again from rotor.

As a result, due to will not be used as pump play a role and (do not generate pressure) until blade to the periphery of rotor stretch out, Therefore the starting of vane pump generates delay.

Moreover, oily viscosity is also relatively low in the case where environment temperature relative warmth, therefore, even if rotor starts to revolve Turn, blade is also easier to stretch out from rotor.

However, the viscosity of oil is got higher, and the viscous drag of blade and oil also becomes larger if becoming the low temperature environments such as winter, because This, as a result, the stretching of blade from rotor is slack-off, with the warm environment the case where compared with, generate desired pressure it Before need the time.

Therefore, Patent Document 1 discloses following contents: multiple back pressures are arranged in the end face for constituting the side plate of vane pump These multiple back pressure slots are connected to each other by slot by connectivity slot, and the blade that the blade groove of rotor is thus fallen into pump startup is fast It stretches out fastly, thus, it is possible to improve the startability of pump.

Patent document 1: Japanese Unexamined Patent Publication 2012-092654 bulletin

Summary of the invention

Subject to be solved by the invention

In vane pump disclosed in patent document 1, pass through company due to being set to all back pressure slots of end face of side plate Through slot and connect, therefore even if in inside there are multiple ejection ports, if the ejiction opening of vane pump is only at one, eventually as The ejection pressure of vane pump is also a level.

But in the case where vane pump is applied to automobile transmission, high pressure and low pressure both (two water are needed It is flat) pressure oil.

In this case, in the vane pump disclosed in patent document 1, spraying pressure is a level, therefore, is further needed The pressure of oil is divided into the other equipment such as high pressure and low pressure the two horizontal distribution valves.

Therefore, the issue of the present invention is to provide a kind of vane pump, merely with 1 vane pump spray high pressure and low pressure this two Kind pressure oil, and promptly carry out the starting of vane pump.

A technical solution to solve project

In order to solve above-mentioned problem, the present invention is a kind of vane pump, is at least had: the pump housing with suction inlet；It receives It is dissolved in the stator of the recess portion of the pump housing；It is contained in stator, is radially formed with the rotor of multiple blade grooves in outer peripheral surface；It is embedding Enter multiple blades of multiple blade grooves；It is configured at the 1st side plate of an end surface side of stator and the ejiction opening side of oil；It is configured at stator Other end surface side and oil suction inlet side the 2nd side plate；And tool there are two the ejiction opening of the oil at position and covers the pump housing The pump cover of the opening portion of recess portion, which is characterized in that in the rotor-side of the 1st side plate and the 2nd side plate, be formed with mutually independent A pair of of back pressure slot.

Here, multiple blades are installed into, can be entered and left in the state of being respectively embedded into blade groove towards stator.

Also, the back pressure slot includes the 1st back pressure slot；2nd back pressure slot, slot length are shorter than the 1st back pressure slot；And the 3rd back pressure Slot links the 1st back pressure slot and the 2nd back pressure slot, and groove width is narrower than the 1st back pressure slot and the 2nd back pressure slot.

In addition, the 2nd back pressure slot in the 1st side plate is equipped with and passes through from the rotor side of the 1st side plate to opposite (reversed) side of rotor The hole portion worn.

2nd back pressure slot of the 1st side plate can also be configured to, via the hole portion and the recess portion by being set to pump cover and the 1st side The hyperbaric chamber that plate is formed is connected.

Furthermore, it is also possible to deepen the groove depth of the 1st back pressure slot with close to the 3rd back pressure slot.

Invention effect

Vane pump according to the present invention, the hydraulic device other without distributing valve etc. can spray high pressure and low with monomer Press both pressure oils.

In addition, performance in the environment of minimum extremely low temperature (- 30 DEG C or less) of the viscosity in oil can promptly into Effect as the starting of row vane pump.

Detailed description of the invention

Fig. 1 is the cross-sectional view for indicating the vane pump 1 of one embodiment of the present invention.

Fig. 2 is the X-X line cross-sectional view of the vane pump 1 in Fig. 1.

Fig. 3 is the Y-Y line cross-sectional view of the vane pump 1 in Fig. 1.

Fig. 4 is the top view of 4 side of rotor of the 1st side plate 7 shown in FIG. 1.

Fig. 5 is the top view of the side opposite with rotor 4 of the 1st side plate 7 shown in FIG. 1.

Fig. 6 is the enlarged drawing of the back pressure slot 70 of the 1st side plate 7 shown in Fig. 4.

Fig. 7 is the top view of 4 side of rotor of the 2nd side plate 8 shown in FIG. 1.

Fig. 8 is the top view of the side opposite with rotor 4 of the 2nd side plate 8 shown in FIG. 1.

Fig. 9 is the enlarged drawing of the back pressure slot 80 of the 2nd side plate 8 shown in Fig. 7.

Figure 10 is the integrally-built schematic diagram for indicating performance test apparatus 200 used in embodiment.

Figure 11 is the curve graph for indicating to have used the result of the performance test of product of the present invention in embodiment.

Figure 12 is the curve graph for indicating to have used the result of the performance test of existing product in embodiment.

Description of symbols

1,201 vane pump

2 pump housings

3 stators

4 rotors

5 blade grooves

6 blades

7 the 1st side plates

8 the 2nd side plates

9 axis

10 pump covers

The recess portion of 20 pump housings

30 suction inlets

40,41 ejiction opening

50, the hole portion of 51 the 1st side plates

60,61 hyperbaric chamber

70, the back pressure slot of 71 the 1st side plates

1st back pressure slot of the 1st side plate of 70A, 71A

2nd back pressure slot of the 1st side plate of 70B, 71B

3rd back pressure slot of the 1st side plate of 70C, 71C

1st inhalation port of 72 the 1st side plates

2nd inhalation port of 73 the 1st side plates

The 1st of 76 the 1st side plates sprays port

The 2nd of 77 the 1st side plates sprays port

80, the back pressure slot of 81 the 2nd side plates

1st back pressure slot of the 2nd side plate of 80A, 81A

2nd back pressure slot of the 2nd side plate of 80B, 81B

3rd back pressure slot of the 2nd side plate of 80C, 81C

1st inhalation port of 82 the 2nd side plates

2nd inhalation port of 83 the 2nd side plates

The 1st of 86 the 2nd side plates stockpiles slot

The 2nd of 87 the 2nd side plates stockpiles slot

100, the recess portion of 101 pump covers

200 performance test apparatus

210 food trays

220 motors

230 tropometers

240 pressure valve

250 pressure converters

261~264 oil circuits

270 thermostatic chambers

The slot length of 1st~the 3rd back pressure slot of the 1st side plate of la~lc

The slot length of 1st~the 3rd back pressure slot of the 2nd side plate of fa~fc

The imaginary centres of the 1st side plate of O1

The imaginary centres of the 2nd side plate of O2

Specific embodiment

It is illustrated using an example of attached drawing to embodiments of the present invention.

Fig. 1 is the cross-sectional view of the vane pump 1 of an example as embodiments of the present invention, and Fig. 2 is the vane pump 1 in Fig. 1 X-X line cross-sectional view, Fig. 3 is the Y-Y line cross-sectional view of the vane pump 1 in Fig. 1.

As shown in FIG. 1 to 3, vane pump 1 is substantially made of the pump housing 2 and pump cover 10.

Oil is sucked inside from the suction inlet 30 at a position for being set to the pump housing 2 to vane pump 1, and from being set to pump cover 10 Two positions ejiction opening 40,41 be discharged (ejection) vane pump 1 inside oil.

In addition, in vane pump 1, as shown in Figure 1, to run through the hole portion in the center of rotor 4 and be set in pump cover 10 The mode of the hole portion of centre is equipped with axis 9.

As shown in Figures 2 and 3, in the inside (recess portion 20) of the pump housing 2, cricoid stator 3 is contained in nested shape, and The inside of the stator 3 contains rotor 4 in nested shape.

Multiple blade grooves 5,5 are radially provided in the outer peripheral surface of rotor 4, and multiple blades 6,6 are with can be in rotor 4 The state radially entered and left be respectively embedded into each blade groove 5,5.

Each blade 6 enters and leaves along the inside of stator 3 towards the stator, rotation moves on one side on one side with the rotation of rotor 4 It is dynamic.

In addition, as shown in Figure 1, stator 3 both ends of the surface, configured with substantially disk in a manner of clipping rotor 4 from two sides 1st side plate 7 of shape and the 2nd side plate 8.

As shown in FIG. 1 to 3, in an end surface side of stator 3 and rotor 4 and close to the position of ejiction opening 40,41 configuration the 1st Side plate 7 configures the 2nd side plate 8 in the other end surface side of stator 3 and rotor 4 and close to the position of suction inlet 30.

Also, as shown in Figure 1, being known as height by the space that the recess portion 100,101 and the 1st side plate 7 of pump cover 10 mark off The space of pressure chamber 60,61.

Flowed into inside from suction inlet 30 to vane pump 1 oil by hyperbaric chamber 60,61 pressurize in the state of to ejiction opening 40, 41 direction conveying.

Then, it is illustrated using mode of the attached drawing to the 1st side plate 7.

Fig. 4 is the top view from 4 side of rotor of the 1st side plate 7 shown in FIG. 1, and Fig. 5 is indicated from the 1st side shown in FIG. 1 The top view of side (the pump cover 10 side) observation opposite with rotor 4 of plate 7.

As shown in figure 4, being formed with the sucking of the 1st inhalation port 72 and the 2nd in the end face for the 1st side plate 7 for being configured at 4 side of rotor The 73, the 1st inhalation port 72 of port and the 2nd inhalation port 73 are inhaled into vane pump 1 in oil via suction inlet 30 shown in FIG. 1 After portion, oil is conveyed to the direction of rotor 4.

Also, convey the oil flowed out from rotor 4 to the direction of the ejiction opening 40,41 at two positions the 1st sprays port 76 and the 2nd ejection port 77 is also formed in the end face for being configured at the 1st side plate 7 of 4 side of rotor.

In addition, as shown in figure 4, in the end face for the 1st side plate 7 for being configured at 4 side of rotor, in the hole in the center passed through for axis 9 It is provided with a pair of of back pressure slot 70,71 around portion in arc-shaped in a manner of opposite each other.

Each back pressure slot 70,71 substantially by the 1st back pressure slot 70A, 71A, the 2nd back pressure slot 70B, 71B and the 3rd back pressure slot 70C, 71C is formed.

The enlarged drawing for being set to the back pressure slot 70 of end face of the 1st side plate 7 is shown in FIG. 6.

As shown in fig. 6, the slot length la of the 1st back pressure slot 70A the 1st~the 3rd back pressure slot 70A for being set to the 1st side plate 7~ Longest in 70C.

In addition, the groove depth (from the surface of the 1st side plate 7 to the distance of slot bottom) of the 1st back pressure slot 70A is carried on the back with close to the 3rd Indent 70C and gradually deepen.

As shown in Fig. 4 and Fig. 6, the 2nd back pressure slot 70B is connected via aftermentioned 3rd back pressure slot 70C and the 1st back pressure slot 70A The back pressure slot of knot.

In addition, as shown in fig. 6, the slot length lb of the 2nd back pressure slot 70B is shorter than the slot length la of the 1st back pressure slot 70A.

Also, has the hole portion on the two sides (4 side of rotor and 10 side of pump cover) of the 1st side plate 7 of connection in the 2nd back pressure slot 70B 50。

As shown in Fig. 4 and Fig. 6, the 3rd back pressure slot 70C is above-mentioned the 1st back pressure slot 70A and the 2nd back pressure slot 70B of connection Back pressure slot.

The slot length lc of 3rd back pressure slot 70C is most short in the 1st~the 3rd back pressure slot 70A~70C.

In addition, the groove width of the 3rd back pressure slot 70C is most narrow in the 1st~the 3rd back pressure slot 70A~70C.

Here, the 3rd back pressure slot 70C is for making its flowing when oil is mobile to the 2nd back pressure slot 70B from the 1st back pressure slot 70A The back pressure slot of throttling.

As one of mode, keep the groove width of the 3rd back pressure slot 70C narrower than other back pressure slots.

Therefore, as long as can temporarily throttle to flow, it is also possible to other modes.

In addition, in this application, as shown in fig. 6, slot length la~lc of the 1st~the 3rd back pressure slot 70A~70C is connection The both ends of the imaginary centres O1 of 1st side plate 7 and each back pressure slot 70A~70C and the length (arc length) of circular arc formed.

In addition, above explanation is related to the structure of back pressure slot 70, but form the 1st back pressure slot of the back pressure slot 71 of another party Configuration relation, the slot length of 71A, the 2nd back pressure slot 71B, the 3rd back pressure slot 71C etc. are also identical.

As shown in figure 5, the end face for the 1st side plate 7 for being configured at 10 side of pump cover be formed with the above-mentioned 1st spray port 76 and 2nd sprays port 77.

That is, the 1st sprays the ejection port 77 of port 76 and the 2nd in the same manner as above-mentioned hole portion 50,51 to run through the 1st side plate 7 The mode on two sides (10 side of 4 side of rotor and pump cover) be set to the 1st side plate 7.

Then, it is illustrated using mode of the attached drawing to the 2nd side plate 8.

Fig. 7 is the top view from 4 side of rotor of the 2nd side plate 8 shown in FIG. 1, and Fig. 8 is from the 2nd side plate shown in FIG. 1 The top view of 8 side (the suction inlet 30 side) observation opposite with rotor 4.

Firstly, to after sucking oil inside vane pump 1, being conveyed to the direction of rotor 4 via suction inlet 30 shown in FIG. 1 1st suction inlet 82 of oil and the 2nd suction inlet 83 are set to the 2nd side plate 8 like that as shown in Figure 7 and Figure 8.

It is stockpiled in a certain amount of vane pump 1 as shown in fig. 7, being formed in the end face for the 2nd side plate 8 for being configured at 4 side of rotor The 1st of the oil in portion stockpiles slot 86 and the 2nd and stockpiles slot 87.

In addition, as shown in fig. 7, in the end face for the 2nd side plate 8 for being configured at 4 side of rotor, in the hole in the center passed through for axis 9 It is provided with a pair of of back pressure slot 80,81 around portion in arc-shaped in a manner of opposite each other.

Each back pressure slot 80,81 is by the 1st back pressure slot 80A, 81A, the 2nd back pressure slot 80B, 81B and the 3rd back pressure slot 80C, 81C shape At.Fig. 9 indicates the enlarged drawing of the back pressure slot 80 of the 2nd side plate 8 shown in Fig. 7.

As shown in figure 9, the slot length fa of the 1st back pressure slot 80A the 1st~the 3rd back pressure slot 80A for being set to the 2nd side plate 8~ Longest in 80C.

In addition, the groove depth (from the surface of the 2nd side plate 8 to the distance of slot bottom) of the 1st back pressure slot 80A is carried on the back with close to the 3rd Indent 80C and gradually deepen.

As shown in figures 7 and 9, the 2nd back pressure slot 80B is linked via aftermentioned 3rd back pressure slot 80C and the 1st back pressure slot 80A Back pressure slot.

In addition, the slot length fb of the 2nd back pressure slot 80B is shorter than the slot length fa of the 1st back pressure slot 80A.

As shown in figures 7 and 9, the 3rd back pressure slot 80C is the back of above-mentioned the 1st back pressure slot 80A and the 2nd back pressure slot 80B of connection Indent.

The slot length fc of 3rd back pressure slot 80C is most short in the 1st~the 3rd back pressure slot 80A~80C.

In addition, the groove width of the 3rd back pressure slot 80C is most narrow in the 1st~the 3rd back pressure slot 80A~80C.

In addition, here, as shown in figure 9, slot length fa~fc of the 1st~the 3rd back pressure slot 80A~80C is by the 2nd side plate 8 Imaginary centres O2 and each back pressure slot 80A~80C both ends connection and formed circular arc length (arc length).

In addition, above explanation is related to the structure of back pressure slot 80, but form the 1st back pressure slot of the back pressure slot 81 of another party Configuration relation, the slot length of 81A, the 2nd back pressure slot 81B, the 3rd back pressure slot 81C etc. are also identical.

According to the above implementation, the effect of vane pump of the invention is illustrated using attached drawing.

Vane pump 1 of the invention rotates rotor 4 by Fig. 2 and the rotation of axis shown in Fig. 39, and multiple blades 6,6 are distinguished On one side along blade groove 5,5 enter and leave while moving in rotation, thus from suction inlet 30 suck oil and from ejiction opening 40,41 be discharged oil.

The oil in vane pump 1 is inhaled into via the 1st and the 2nd suction inlet the 72,73 and the 2nd of the 1st side plate 7 from suction inlet 30 The the 1st and the 2nd suction inlet 82,83 of side plate 8 etc. enters the periphery of rotor 4 and blade 6.

Oil into the multiple blade grooves 5,5 for the periphery for being set to rotor 4 is mobile from 8 side of the 2nd side plate to 7 side of the 1st side plate When, while also entering 4 side of rotor.

Make that is, oil is played from blade groove 5 to the movement of 4 side of rotor to the direction for stretching out blade 6 to the outside of rotor 4 With.

In contrast, it if the rotation further progress of axis 9, is accommodated along the shape of the inner peripheral surface of stator 3 to by blade 6 It plays a role in the direction in the blade groove 5 of rotor 4.

Also enter in the blade groove 5 of rotor 4 at this point, being present in the oil around rotor 4.

Configuration is come together in two side plates (the 1st side plate 7, the 2nd side plate 8) of the two sides of rotor 4 into the oil in blade groove 5 Back pressure slot.

For example, the oil for coming together in the back pressure slot 70 of the 1st side plate 7 is first focused on the 1st back pressure slot 70A.

Here, axis 9 be rotated on the paper of Fig. 2 be rotation counterclockwise in the case where, since multiple blades 6,6 are received Hold in the blade groove 5 of rotor 4, therefore, positioned at the 1st back pressure slot 70A oil under the action of its pressure to the 2nd back pressure slot 70B Direction it is mobile.

Oil in 1st back pressure slot 70A passes through the 3rd most narrow back pressure slot of groove width before mobile to the 2nd back pressure slot 70B 70C。

Therefore, the movement of the oil in the 1st back pressure slot 70A is come together in front of mobile to the direction of the 2nd back pressure slot 70B by the 3 back pressure slot 70C temporary throttles.

As a result, the direction for coming together in most of blade groove 5 to rotor 4 of the oil in the 1st back pressure slot 70A is mobile, only It is only not mobile to the 2nd back pressure slot 70B by the 3rd back pressure slot 70C to the mobile remaining oil of blade groove 5.

The oily also direction with same main points to blade groove 5 and the 2nd back pressure slot in the 1st back pressure slot 71A of another party The direction of 71B is mobile.

In addition, the movement of the oil about the back pressure slot 80,81 for coming together in the 2nd side plate 8 is also same.

As noted previously, as coming together in the 1st back pressure slot 70A, 71A of the 1st side plate 7 and the 1st back pressure of the 2nd side plate 8 Oil in slot 80A, 81A it is most of mobile to the blade groove 5 of rotor 4, therefore from the 1st back pressure slot 70A, 71A, 80A, 81A to The pressure of the mobile oil of blade groove 5 becomes height compared with the pressure for the oil that the direction around rotor 4 into blade groove 5 enters Pressure, can be easily from blade groove 5 towards the stretching of progress blade 6 to the outer direction.

Therefore, it using the above-mentioned construction for the back pressure slot being arranged on the side plate for constituting vane pump of the invention, can be easy Ground carries out the stretching of blade from blade groove.

As a result, the generation of oil pressure when can promptly carry out blade pump startup.

In addition, vane pump of the invention is separately provided with the back for being set to two side plates as shown in Fig. 4~Fig. 9 Indent.

In particular, in the 2nd back pressure slot 70B, 71B of the 1st side plate 7 of the ejiction opening 40,41 sides that are set to two positions, As described above, being respectively arranged with the hole portion 50,51 connected to the side (pump cover 10 side) opposite with rotor 4 from 4 side of rotor.

Moreover, these hole portions 50,51 are connected with the hyperbaric chamber 60,61 being formed between the 1st side plate 7 and pump cover 10, moreover, These hyperbaric chambers 60,61 are connected with the ejiction opening 40,41 at two positions respectively.

That is, the oil in the 2nd back pressure slot 70B, 71B of the 1st side plate 7 is via each hole portion 50,51 and hyperbaric chamber 60,61 from two The ejiction opening 40,41 at a position is discharged.

In conclusion the back pressure flute profile for being set to side plate is become a pair of independent slot by vane pump of the invention, from each back The oily access of indent to each ejiction opening is also separately provided.

Thereby, it is possible to utilize 1 vane pump supply high pressure and low pressure both pressure oils.

Embodiment 1

It is illustrated using performance test of the attached drawing to the vane pump in the present embodiment.

This performance test is for using vane pump of the invention (hereinafter referred to as " product of the present invention ") and existing blade Pump (hereinafter referred to as " existing product ") come confirm the purpose of the starting performance of the vane pump in the environment of extremely low temperature (- 30 DEG C) and into Capable.

The overall structure of performance test apparatus 200 used in this performance test is shown in Figure 10.

Firstly, product of the present invention used in this performance test is the vane pump of mode shown in FIG. 1 to FIG. 9.

In contrast, existing product, which has used, is not provided with the of the 1st side plate 7 shown in Fig. 4 and the 2nd side plate 8 shown in Fig. 7 3 back pressure slot 70C, 71C, 80C, 81C and have the 1st back pressure slot 70A, 71A, 80A, 81A and the 2nd back pressure slot 70B, 71B, 80B, (the 1st and the 2nd) side plate of the mode for the back pressure slot that 81B is integrally formed.

It is identical as product of the present invention about other component parts.

Then, performance test apparatus 200 is also made of motor 220, pressure valve 240 etc. other than vane pump 201, these Mechanical part is connected to each other via oil circuit 261~264.

It is rotated by the axis of motor 220, the oil of food tray 210 is inhaled into vane pump 201 via oil circuit 261.

The revolving speed of the axis of motor 220 can be measured by being set to the tropometer 230 of axis.

The oil for being inhaled into vane pump 201 is sprayed from ejiction opening 40,41 shown in Fig. 2, and is conveyed via oil circuit 262,263 To pressure valve 240.

By the opening and closing degree of the pressure valve 240 come the pressure (oil pressure) of the oil of tuning performance experimental rig 200.

The oil flowed out from pressure valve 240 finally returns that food tray 210 via oil circuit 264.

In addition, as shown in Figure 10, the whole series mechanical part such as these vane pumps 201, motor 220, pressure valve 240 all accommodates It, being capable of Adjustment Tests environment (test temperature) freely in thermostatic chamber 270.

In addition, being additionally provided with the supply power supply of motor 220 (not shown) in performance test apparatus 200, to tropometer 230, pressure converter 250 is controlled electrical wiring measures the revolving speed of motor 220, the oil pressure of oil circuit 261~264 Various measuring devices etc..

Then, the test method of this performance test is illustrated.

Make in the state that the temperature in the thermostatic chamber 270 of performance test apparatus 200 shown in Fig. 10 is set as 25 DEG C Motor 220 rotates, to vane pump 201 for oil supply.

Meanwhile the pressure (spray and press) of the oil from vane pump 201 is set as 1.8MPa using pressure valve 240.

It has passed through in this state after a certain period of time, stop motor 220, stop to vane pump 201 for oil supply.

Then, the temperature in thermostatic chamber 270 is changed to -30 DEG C, by the equal a whole set of mechanical part of vane pump 201 in the state It is lower to be kept for 8 hours.

Reach -30 DEG C in the temperature in thermostatic chamber 270 to rise after 8 hours, opens motor 220 with the revolving speed of 200rpm It is dynamic, it is kept for 1.5 seconds.

Later, the revolving speed of motor 220 is changed from 200rpm to 1800rpm.

In this performance test, using pressure converter 250 and measuring device (not shown), timely measure from making horse The variation of the pressure (spraying pressure) of the oil of the ejection of the slave vane pump 201 in about 12 seconds is started with 200rpm up to 220.

Hereinafter, being carried out using performance test results of the attached drawing to each vane pump for having used product of the present invention and existing product Explanation.

The result (curve graph) for having used the performance test of product of the present invention is shown in Figure 11, existing product will have been used The result (curve graph) of performance test is shown in Figure 12.

The curve graph for indicating test result is that horizontal axis indicates to start horse from the revolving speed of 200rpm in Figure 11 and Figure 12 Up to 220 by time (unit: second), the longitudinal axis on right side indicates the motor 220 that tropometer 230 as shown in Figure 10 is measured Revolving speed (unit: rpm), the longitudinal axis in left side indicates that the slave vane pump 201 that pressure converter 250 as shown in Figure 10 is measured sprays The pressure (unit: MPa) of oil out.

In addition, the horizontal axis of two attached drawings is indicated using the time that motor starts starting as starting point (with 0 second).

In addition, will reach 200rpm in the curve graph of Figure 11 and Figure 12 from motor starting revolving speed and play by 1.5 Second until period be divided into A1, B1, later, by until confirm oil from vane pump spray until time be divided into A2, The time until pressure of oil reaches peak (maximum is pressed) is divided into A3, B3 later by B2.

In the performance test for having used product of the present invention, firstly, as preparing to operate, as shown in figure 11, starter motor, Revolving speed reaches 200rpm after about 0.5 second, keeps 1.5 seconds (section A1 shown in Figure 11) in this state.

Later, the revolving speed of motor is changed to 1800rpm from 200rpm.

When the revolving speed of motor is changed to 1800rpm, confirmed from vane pump of the invention: moment (after 0.046 second: The section A2 shown in Figure 11) oil boosting (rising of oily pressure).

After confirming the oil based on vane pump and having boosted about 0.6 second, confirm: oily pressure reaches peak (about 4.2MPa) (section A3 shown in Figure 11), oily pressure falls to approximately 1.7MPa later, and maintains the pressure.

In contrast, using existing product performance test in, with use product of the present invention performance test the case where It similarly, as shown in figure 12, will after being kept for 1.5 seconds from the revolving speed of motor reaches 200rpm (section B1 shown in Figure 12) The revolving speed of motor is changed to 1800rpm from 200rpm.

When the revolving speed of motor is changed to 1800rpm, confirmed from existing product: from the revolving speed of motor change about After 4.6 seconds (section B2 shown in Figure 12), oil boosting.

After confirming the oil based on vane pump and having boosted about 0.2 second (section B3 shown in Figure 12), oily pressure reaches Peak (about 5MPa), oily pressure falls to approximately 1.7MPa in the same manner as the performance test results of product of the present invention later, and Maintain the pressure.

According to above test result, the starting performance of the vane pump under the use environment of extremely low temperature (- 30 DEG C) is carried out Compare, in previous vane pump (existing product), from the rotation with motor receives the supply of oil, to the spray for starting oil Time until out (until blade pump startup) needs about 4.6 seconds.

On the other hand, confirm in vane pump of the invention: from receiving the supply via the oil of suction inlet, moment will The oil is sprayed to outside vane pump, i.e., with the rising of the revolving speed of motor, the starting of vane pump moment.

Industrial availability

Vane pump of the invention is able to carry out multiple controls for spraying pressure, and startability is excellent, therefore can be used in various The vane pump of purposes.

Claims

1. a kind of vane pump, at least has: the pump housing with suction inlet；It is contained in the stator of the recess portion of the pump housing；Receiving In in the stator, the rotor of multiple blade grooves is radially formed in outer peripheral surface；It is embedded in the more of the multiple blade groove A blade；It is configured at an end surface side of the stator and the 1st side plate of ejiction opening side；It is configured at the other end surface side of the stator And the 2nd side plate of side where the suction inlet；And there are two the ejiction opening at position and the recess portions of the covering pump housing for tool Opening portion pump cover, which is characterized in that

In side where the rotor of the 1st side plate and the 2nd side plate, it is formed with mutually independent a pair of of back pressure slot,

The back pressure slot includes

1st back pressure slot；

2nd back pressure slot, slot length are shorter than the 1st back pressure slot；And

3rd back pressure slot links the 1st back pressure slot and the 2nd back pressure slot, and groove width than the 1st back pressure slot and The 2nd back pressure slot is narrow.

2. vane pump according to claim 1, which is characterized in that

2nd back pressure slot of the 1st side plate has the opposite side from the rotor place side of the 1st side plate to the rotor Perforative hole portion,

2nd back pressure slot of the 1st side plate is via the hole portion and the recess portion by being set to the pump cover and the 1st side plate shape At hyperbaric chamber be connected.

3. vane pump according to claim 1 or 2, which is characterized in that

The groove depth of the 1st back pressure slot is deepened with close to the 3rd back pressure slot.