CN207454252U - For the cladding component of pump - Google Patents

Abstract

The utility model describes a kind of cladding component for pump, is provided at least one pumping group and is connected at least one dynamic transfer system of the pumping group.Cladding component includes the cladding container of general cylindrical shape, and the cladding container is provided at one end thereof to be open and be configured to be at least partially enveloping pumping group and corresponding dynamic transfer system.Cladding component further includes at least one closed plate, hermetically couples with cladding container at the open end of cladding container, and is configured to synergistically be sealed shut pumping group and corresponding dynamic transfer system with the cladding container.At least one waveform spring is provided in predetermined contact portion between cladding container and closed plate, is configured to dynamically be kept pumping group under compression by means of closed plate.Waveform spring is thus, it is possible to absorb due to the possible thermal expansion of the component of pumping group caused by such as temperature change, so as to ensure a degree of compression always.

Description

For the cladding component of pump

Technical field

The present invention relates to a kind of elastomeric overmold component for pump, the pump is particularly but be not exclusively with internal gear Or the positive displacement pump of external gear.

Background technology

As it is known, positive displacement pump is the pump of following concrete type：The pump changes to cause using the volume in chamber To the suction or thrust of incompressible fluid.Positive displacement pump includes the rotary pump of gear type, in the rotary pump, passes through element Rotation obtain the variation of the volume of work chamber, enabling limit the rotation chamber with variable volume, the element leads to It is often two gears being engaged with each other.Gear pump is widely used in lubricating area, and it is particularly viscous to be generally used for liquid to be transferred In thick all applications.

For example, the gear that so-called internal gear pump is configured in two gears is arranged in another gear internal, but It is that two gears are arranged on the axis of biasing.Separation assembly protects the separation of two gears by means of semi-moon shaped partition wall. When each tooth separates, recess allows liquid to enter the cavity formed between the tooth of gear itself as caused by gear movement In.On the other hand, when the tooth of gear is closer to each other, the superpressure for promoting the discharge areas of liquid towards pump is generated.

In gear pump, the power transmission usually generated by motor can be carried out by so-called " magnetic drive ".It should Transmission system is set there are two coaxial magnet ring or core, and an installation in the magnet ring or core is on the driving shaft, and another It is a on the axis of rotor (impeller) (in other words, one in the gear of pump).By applying torque, mounted on drive The magnetic field direction of core on moving axis is mounted on the magnetic field movement of the identical polar of the core on the axis of rotor, and passes through magnetic repulsion Effect promotes drive shaft rotation.

At present, the component of most common gear pump and dynamic transfer system are by the cladding container (containment that seals Vessel) surround, the cladding container is made of metal material (being typically stainless steel).For encapsulating these components and closing It is (perpendicular on the body of pump, such as by cold deformation that the cost effective solution of pump includes to coat the plate benging of protector To compacting or laterally roll (rolling)) it is bent.

If pump is run at a temperature of especially low, and if pump be subjected to it is more or less prolonged inactive, Due to the freezing action of liquid itself, for pump, the volume of liquid to be pumped may increase.Therefore, the sealing of pump Therefore the fact that cladding container can not compensate this increase of volume may cause the damage for the internal mechanism for pumping itself.

The file EP 2273121A2 for belonging to same applicant describe a kind of cladding component for pump, the cladding group Part is configured to the possible increase of the volume for the liquid that compensation pump own content is received.However, in addition to these increases of volume, In pump during normal operation, excessive tolerance or " gap " may also be generated between the moving component of itself is pumped.These Gap is mainly the pump due to (in other words, in the event of high temperatures) occurring under the operating condition opposite with above-mentioned operating condition Component thermal expansion.Regardless of reason, these gaps may all damage the correct operation of pump under any circumstance.

The content of the invention

Therefore, overall purpose of the invention is to manufacture a kind of elastomeric overmold component for pump, the elastomeric overmold component Can by very simple, cost effective and it is particularly practical in a manner of solve the disadvantages mentioned above of the prior art.

In detail, the object of the invention is to produce a kind of elastomeric overmold component for pump, the elastomeric overmold components It can at least partly be made up in the case of the volume expansion of the pumped fluid caused by the low temperature and pump the internal clearance of itself.

Another object of the present invention is a kind of elastomeric overmold component for pump of manufacture, and the elastomeric overmold component can The internal clearance of itself is pumped being made up at least partly in the case of the component thermal expansion of itself is pumped caused by high temperature.

Another object of the present invention is a kind of elastomeric overmold component for pump of manufacture, and the elastomeric overmold component can The internal part for pumping itself is dynamically maintained at correct compressive state.

These purposes according to the present invention are realized by manufacturing the following elastomeric overmold component for pump：The cladding Component is provided at least one pumping group and at least one dynamic transfer system, and the dynamic transfer system is used for power transmission To the pumping group, the cladding component includes columnar cladding container and at least one closed plate, and the cladding container exists An end in two end is provided with opening, and the cladding container structure is into being at least partially enveloping the pumping group With corresponding dynamic transfer system, the closed plate coats container hermetically at the open end of the cladding container with described Connection, and be configured to collaboratively be sealed shut the pumping group and corresponding dynamic transfer system with the cladding container, At least one waveform spring, the waveform are provided in predetermined contact portion between the cladding container and the closed plate Spring is configured to dynamically be kept the pumping group under compression by means of the closed plate, and the waveform spring is thus Make it possible to absorb the possible thermal expansion of the component of the pumping group.

Other features and advantages of the present invention further describe in such as lower part.

Preferably, it is additionally provided with comparison in the predetermined contact portion between the cladding container and the closed plate Ring, the comparison ring are arranged to contact directly with the waveform spring, and against the specific wall of the cladding container, with true Protect the rigid support to the waveform spring.

Preferably, the waveform spring is arranged between the comparison ring and the closed plate.

Preferably, the waveform spring is the spring for single coil.

Preferably, the waveform spring has rectangular cross section.

Preferably, the outer diameter of the waveform spring is equal to the internal diameter of the cladding container and the outer diameter of the closed plate.

Preferably, the waveform spring is manufactured by metal material.

Preferably, the comparison ring is manufactured by metal material.

Preferably, the pumping group include first gear and second gear, the first gear in the first fixing axle from By rotating, the second gear rotates freely in the second fixing axle, and first fixing axle and second fixing axle are located at In difference but the axis being mutually parallel so that the first gear can be engaged with the second gear.

Preferably, the dynamic transfer system includes magnet, and the magnet is by motor activated.

Preferably, the closed plate includes fixed flange, and in other words, the closed plate can be fixed to predetermined structure, And the cladding container includes unlocked protector, the unlocked protector is configured to due to waveform spring presence and phase It is moved axially for the fixed flange.

Preferably, in addition to the waveform spring, also set between the unlocked protector and the fixed flange It is equipped with the first sealing ring and the second sealing ring, first sealing ring supporting for O shapes style type and with cushion stroke terminal The function of connecing, second sealing ring are also O-ring type.

Description of the drawings

With reference to accompanying schematic figure, by the following description for being given as examples the purpose not for limitation, according to this hair The feature and advantage of the bright elastomeric overmold component for pump are incited somebody to action and become more apparent upon, wherein：

Fig. 1 is the perspective view for the first embodiment for showing the elastomeric overmold component made according to the present invention for pump；

Fig. 2 is with the perspective view of the cladding component of Fig. 1 shown in partly assembled construction；

Fig. 3 is the sectional view of the cladding component of Fig. 1；

Fig. 4 shows the amplification details of the sectional view of Fig. 3；

Fig. 5 is the perspective view of two components of the cladding component of Fig. 1；

Fig. 6 is the exploded view for the second embodiment for showing the elastomeric overmold component made according to the present invention for pump；With

Fig. 7 is the sectional view of the cladding component of Fig. 6.

It should be pointed out that in the the accompanying drawings and the following description, many components of pump will not be mentioned and/or show, because it Be well known to those skilled in the art component.

Specific embodiment

Refer to the attached drawing shows the elastomeric overmold component made according to the present invention for pump, the elastomeric overmold component It is whole to be shown with reference numeral 10.Cladding component 10 is configured for mount on general pump, and the cladding component internal is provided with At least one pumping group and it is provided at least one dynamic transfer system for being connected to the pumping group.

In the embodiments illustrated in the figures, pump be with cogged positive displacement pump, and accordingly pumping group with itself The mode known includes first gear 12 and second gear 14, and the first gear 12 rotates freely in the first fixing axle 16, institute Second gear 14 is stated to rotate freely in the second fixing axle 18.Alternately, again in a manner known in itself, each gear 12 Can be assembled on corresponding axis 16 and 18 with 14 or, in other words, corresponding 16 He of axis can be fixedly connected to 18.16 and second axis 18 of first axle is located on axis that is different but being mutually parallel so that first gear 12 can be with second gear 14 engagements.Therefore, during first gear 12 is rotated compared with second gear 14, the disengagement of the tooth of two gears 12 and 14 (unjoining) cause the suction of the liquid in pump, and engage back together so that conveying liquid itself.

Dynamic transfer system is also equipped in first axle 16 and first gear 12, in this case, the power Transmission system is included usually by the magnet 20 of motor activated.Therefore, coating component 10 includes substantially cylindrical cladding container 22, the cladding container 22 is provided with opening at one in two end.Container 22 is coated preferably by metal material It is made, and is configured to be at least partially enveloping pumping group and corresponding dynamic transfer system.Cladding component 10 further includes at least One closed plate 24, the closed plate 24 hermetically couple at the open end of cladding container 22 with cladding container 22, and It is configured to collaboratively be sealed shut (hermetically enclose) pumping group and corresponding power with the cladding container 22 Transmission system.

According to the present invention, there are at least one waveforms in the predetermined contact portion between cladding container 22 and closed plate 24 Spring 26, the waveform spring 26 have single coil, are preferably manufactured, and be configured to by means of closed plate by metal material 24 dynamically keep pumping group under compression.Therefore, waveform spring 26 makes it possible to absorb due to such as temperature change Caused by pumping group component possible thermal expansion, so as to ensuring a degree of compression always.

Preferably, also there is comparison ring in the above-mentioned predetermined contact portion between cladding container 22 and closed plate 24 28.Following article will be described more clearly, and comparison ring 28 is arranged to contact directly with waveform spring 26, and against cladding container 22 specific wall (in this case, the circumferential edges of the open end of the cladding container 22).It is therefore preferred that also by gold The comparison ring 28 of category material manufacture is configured to ensure that the rigid support to waveform spring 26.It is also preferable that 26 cloth of waveform spring It puts between comparison ring 28 and closed plate 24.

Waveform spring 26 is preferably circular, as the cross section of cladding container 22 and the cross section of closed plate 24 are also It is circular, and waveform spring 26 has rectangular cross section.The outer diameter of waveform spring 26 is substantially equal to the interior of cladding container 22 Footpath and the outer diameter of closed plate 24.

The final number of assembling steps of cladding component 10 is shown in FIG. 2.Number of assembling steps contemplates by pumping group and dynamic accordingly Force transmission system is introduced into the preliminary step in cladding container 22.Thus predict and closed plate 24 is mounted on cladding container 22. At this point, it as shown in Fig. 2, is applied in order in closed plate 24 first by waveform spring 26 and then by comparison ring 28.

Once waveform spring 26 and comparison ring 28 have been improperly seated, the circumference of the open end of container 22 is coated Edge bends (Fig. 3 and 4) around comparison ring 28 in closed plate 24, thus using the rigid support provided by the comparison ring 28 simultaneously And compressed waveform spring 26.

Fig. 6 and 7 shows the second embodiment of cladding component 10 according to the present invention.In this embodiment, closed plate 24 Including fixed flange, in other words, the closed plate 24 can be fixed to predetermined structure by known fixing device.It is another Aspect, cladding container 22 include unlocked protector, and the unlocked protector (floating shield) is configured to due to ripple The presence of shape spring 26 and moved axially compared with fixed flange.Depending on the form of waveform spring 26, which also can Enough overall dimensions compared with pump have significant stroke.

In addition to waveform spring 26,30 He of the first sealing ring is there also is provided between unlocked protector and fixed flange Second sealing ring 32, first sealing ring 30 is O-ring type and has the function of the abutting of cushion stroke terminal, described Second sealing ring 32 is also o-ring type.Cladding component 10 the second embodiment be specifically designed to be for less than The volume compensation of the fluid pumped in the case of the temperature of the solidification point of fluid itself.

Therefore have seen that, the elastomeric overmold component according to the present invention for pump realizes the purpose that front is emphasized. In addition to ensuring that the rigid support (making it possible to obtain radial contour) during closing pump, which constitutes really to incite somebody to action The component of pump dynamically keeps elastic system under compression, and the elastic system is usually made of plastic material.The skill Art condition makes it possible to absorb the possible thermal expansion of the component pumped caused by temperature rise so that ensures always certain The compression of degree.In an identical manner, elastic system can absorb the volume expansion of the fluid pumped during coagulation step. In the case of not having such external elastic system, being introduced only in pump has the function of the element " supported ", will less may be used It can absorb the significant volume change increase of volume (for example, during coagulation step) of fluid.Finally, it is important that strong It adjusts, once external stress is removed, elastic system recovers the original pre-strained state of the component of pump.

The elastomeric overmold component for pump so conceived can be carried out various modifications and changes under any circumstance, institute There are these modifications and changes all to be covered by identical creative concept；Technically it is equal in addition, all details can be used Element replaced.In practice, the material and shape and size used can make choice according to technology requirement.

Therefore, protection scope of the present invention is defined by the following claims.

Claims (12)

1. a kind of cladding component (10) for pump, the cladding component is provided at least one pumping group (12,14,16,18) With at least one dynamic transfer system, the dynamic transfer system is used to transmit power to the pumping group, the cladding group Part (10) includes：

- columnar cladding container (22), an end of the cladding container in two end is provided with opening, institute Cladding container (22) is stated to be configured to be at least partially enveloping the pumping group (12,14,16,18) and corresponding power transmission system System；With

- at least one closed plate (24), the closed plate at the open end of cladding container with described to coat container (22) close Feud couples, and is configured to collaboratively be sealed shut the pumping group (12,14,16,18) with the cladding container (22) With corresponding dynamic transfer system,

It is characterized in that, it is described cladding container (22) and the closed plate (24) between predetermined contact portion on be provided with to A few waveform spring (26), the waveform spring be configured to by means of the closed plate (24) by the pumping group (12,14, 16th, 18) dynamically keep under compression, the waveform spring (26) so that can absorb the pumping group (12, 14th, 16, the possible thermal expansion of component 18).

2. it is according to claim 1 for pump cladding component (10), which is characterized in that it is described cladding container (22) and Comparison ring (28) is additionally provided in the predetermined contact portion between the closed plate (24), the comparison ring (28) is arranged to Contacted directly with the waveform spring (26), and against it is described cladding container (22) the end for being provided with opening circle Circumferential edges, to ensure the rigid support to the waveform spring (26).

3. the cladding component (10) according to claim 2 for pump, which is characterized in that waveform spring (26) arrangement Between the comparison ring (28) and the closed plate (24).

4. the cladding component (10) according to claim 1 or 2 for pump, which is characterized in that the waveform spring (26) It is the spring for single coil.

5. the cladding component (10) according to claim 1 or 2 for pump, which is characterized in that the waveform spring (26) With rectangular cross section.

6. the cladding component (10) according to claim 1 or 2 for pump, which is characterized in that the waveform spring (26) Outer diameter be equal to it is described cladding container (22) internal diameter and the closed plate (24) outer diameter.

7. the cladding component (10) according to claim 1 or 2 for pump, which is characterized in that the waveform spring (26) It is manufactured by metal material.

8. the cladding component (10) according to claim 2 for pump, which is characterized in that the comparison ring (28) is by metal Material manufacture.

9. the cladding component (10) according to claim 1 or 2 for pump, which is characterized in that the pumping group includes the One gear (12) and second gear (14), the first gear rotate freely in the first fixing axle (16), the second gear It is rotated freely in the second fixing axle (18), first fixing axle (16) and second fixing axle (18) are located at different but phase Mutually on parallel axis so that the first gear (12) can engage with the second gear (14).

10. the cladding component (10) according to claim 1 or 2 for pump, which is characterized in that the dynamic transfer system Including magnet (20), the magnet is by motor activated.

11. the cladding component (10) according to claim 1 or 2 for pump, which is characterized in that closed plate (24) bag Fixed flange is included, in other words, the closed plate can be fixed to predetermined structure, and the cladding container (22) is including unlocked Protector, the unlocked protector are configured to axial compared with the fixed flange since the waveform spring (26) exists It is mobile.

12. the cladding component (10) according to claim 11 for pump, which is characterized in that except the waveform spring (26) outside, the first sealing ring (30) and the second sealing are additionally provided between the unlocked protector and the fixed flange Ring (32), first sealing ring is O-ring type and has the function of the abutting of cushion stroke terminal, second sealing Ring is also O-ring type.