Single-face flexible oil conservator and medical DR built-in X-ray generator

Abstract

The invention belongs to the field of oil conservator design, and particularly discloses a single-face flexible oil conservator and a medical DR built-in X-ray generator, the single-face flexible oil conservator comprises a shell, a voltage transformation assembly arranged in the shell, an electrical interface connected with the voltage transformation assembly and an oil injection port formed in the shell, the shell is filled with voltage transformation oil, and the voltage transformation assembly is connected with the electrical interface. The end part of the electrical interface is arranged outside the shell, and one end of the oil injection port is communicated with the outer space and the inner space of the shell; and one side surface of the shell is made of a flexible material. The invention combines the space layout to enable gas to be in oil, and improves the utilization efficiency. According to the structural design, the problem that the additional weight cannot be reduced due to the fact that a shell-shaped structure of a traditional oil conservator contains an air chamber is solved. Aiming at the limitation of the structure weight, the thickness and the shape of the shell-shaped structure are optimized by reducing or adjusting the air chamber, and the functional requirements of storing the variable-pressure oil, adapting to temperature rise deformation and the like are met.

Description

Technical Field

[0001] The invention belongs to the technical field of transformer oil pillow design, and in particular relates to a single-sided flexible oil pillow and a medical DR built-in X-ray generator. Background Art

[0002] Oil-immersed transformers use transformer oil as the main insulating and cooling medium, and use the oil between silicon steel sheets to buffer and control operating noise. They have the advantages of compact structure and reliable operation. They are widely used in substations, large mobile charging piles, and X-ray generators.

[0003] In the industry, the shell-like structure that stores transformer oil and wraps transformer components is called an oil pillow or oil box, or oil storage cabinet, and three structural types have been developed: capsule type, diaphragm type, and bellows type.

[0004] The basic principle of the three types of oil pillow structures is to use an isolation device to divide the internal space into two parts: oil (oil chamber) and air (air chamber). Their working methods and differences are: the capsule type and diaphragm type use rubber membranes to construct flexible isolation devices. When the oil heats up and expands, it pushes the flexible isolation device to deform, and the air chamber connected to the ambient atmosphere further squeezes and exhausts the air, thereby achieving deformation coordination inside the oil pillow and long-term stability of the appearance; the bellows type uses a bellows expansion joint as an isolation device, and the working process involves positioning guide wheels, etc.

[0005] The above three ways of "dividing the internal space into two" solve the contradiction between the internal deformation of the oil pillow and the stability of the appearance. The disadvantage is that for the situation where the transformer is embedded in the equipment, the installation space is limited and the temperature rise during operation is small, such as the portable medical DR built-in X-ray generator, the above-mentioned oil pillow structure has the problem of space waste and heavy structure, which limits the overall miniaturization and lightweight development of the equipment. Summary of the invention

[0006] The invention provides a single-sided flexible oil pillow and a medical DR built-in X-ray generator, which are used to solve the problems of heavy structure and space waste of the current oil pillow.

[0007] In order to solve the above technical problems, the technical solution of the present invention is: the single-sided flexible oil pillow comprises: a shell, a transformer assembly arranged in the shell, an electrical interface connected to the transformer assembly, and an oil filling port arranged on the shell, the shell is filled with transformer oil, the end of the electrical interface is arranged outside the shell, and one end of the oil filling port communicates with the outside of the shell and the internal space;

[0008] One side surface of the housing is made of flexible material.

[0009] In a preferred embodiment of the present invention, the size of the housing is obtained by equations 1 to 3:

[0010] M=(Mb+3.0)±0.1 (1)

[0011] N=(Nb+3.0)±0.1 (2)

[0012] K=(Kb+3.0)±0.1 (3)

[0013] Among them, M is the height of the shell, N is the width of the shell, K is the length of the shell, Mb is the height of the outer contour of the transformer assembly, Nb is the width of the outer contour of the transformer assembly, and Kb is the length of the outer contour of the transformer assembly.

[0014] In a preferred embodiment of the present invention, the shell includes five equal-thickness surfaces and one flexible surface, and the thickness D1 of the equal-thickness surfaces is 0.50 mm±0.05 mm.

[0015] In a preferred embodiment of the present invention, the thickness D2 of the flexible surface is obtained by formula 4:

[0016]

[0017] Among them, δ is the maximum convex disturbance, M is the height of the shell, K is the length of the shell, E is the elastic modulus corresponding to the material, η is the Poisson's ratio corresponding to the material, is the elastic limit strength corresponding to the material, and H is the selected value of the size.

[0018] In a preferred embodiment of the present invention, the selected size value H is obtained by formula 5:

[0019] H=max(M,K) (5)

[0020] Wherein, M is the height of the shell, and K is the length of the shell.

[0021] In a preferred embodiment of the present invention, the maximum convex disturbance δ is obtained by formula 6:

[0022]

[0023] Among them, T is the maximum value of the transformer oil temperature increase, V0 is the internal space volume of the oil pillow, α is the linear expansion coefficient of the transformer oil, R is the size limit value, and r is the maximum concave disturbance of the flexible surface.

[0024] In a preferred embodiment of the present invention, the limited dimension value R is obtained by formula 7:

[0025] R=min(M / 2,K / 2) (7)

[0026] Wherein, M is the height of the shell, and K is the length of the shell.

[0027] In a preferred embodiment of the present invention, the internal space volume V0 of the oil pillow is obtained by formula 8:

[0028] V0=0.97×(V1-Vb) (8)

[0029] Wherein, V1 is the total internal space volume of the shell, and Vb is the volume of the transformer assembly.

[0030] In a preferred embodiment of the present invention, the total internal space volume V1 of the housing is obtained by formula 9:

[0031] V1=(M-2×D1)×(N-2×D1)×(K-2×D1) (9)

[0032] Wherein, M is the height of the shell, N is the width of the shell, K is the length of the shell, and D1 is the thickness of the isothickness surface;

[0033] The volume Vb of the transformer assembly is obtained by formula 10:

[0034] Vb=0.353×Mb×Nb×Kb (6)

[0035] Wherein, Mb is the height of the outer contour of the transformer assembly, Nb is the width of the outer contour of the transformer assembly, and Kb is the length of the outer contour of the transformer assembly.

[0036] The present invention further discloses a transformer, characterized in that it comprises any one of the single-sided flexible oil pillows and an oil tank, wherein the oil pillow is arranged on the oil tank.

[0037] The technical solution provided by the present invention has the following advantages compared with the prior art:

[0038] In terms of spatial layout, the present invention solves the problem that the traditional oil pillow is "divided into two" and the size cannot be reduced. In view of the limitation of installation space, the air chamber connected to the ambient atmosphere is reduced or adjusted, and the air is combined with the spatial layout to make the oil and improve the utilization efficiency. In terms of structural design, the problem that the traditional oil pillow shell structure contains the air chamber and the additional weight cannot be reduced is solved. In view of the limitation of structural weight, the thickness and shape of the shell structure are optimized in combination with the reduction or adjustment of the air chamber to meet the functional requirements of storing transformer oil and adapting to temperature increase deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0040] Figure 1is a schematic diagram of a single-sided flexible oil pillow described in one embodiment of the present invention;

[0041] Figure 2 It is a schematic diagram of a single-sided flexible oil pillow in deformation according to one embodiment of the present invention;

[0042] Figure 3 It is a schematic diagram of structural parameters of a single-sided flexible oil pillow described in one embodiment of the present invention.

[0043] As shown in the figure:

[0044] 1-housing; 101-flexible surface; 2-transformer assembly; 3-electrical interface; 4-oil filling port. DETAILED DESCRIPTION

[0045] For ease of understanding, the single-sided flexible oil pillow and the medical DR built-in X-ray generator are described below in conjunction with embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0046] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation and positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0049] like Figure 1As shown, a single-sided flexible oil pillow includes: a housing 1, a transformer assembly 2 disposed in the housing 1, an electrical interface 3 connected to the transformer assembly 2, and an oil filling port 4 disposed on the housing 1. The housing 1 is filled with transformer oil, and the end of the electrical interface 3 is disposed outside the housing 1. The transformer assembly 2 is electrically connected to an external electrical assembly through the electrical interface 3. One end of the oil filling port 4 communicates with the outside of the housing 1 and the internal space, and the transformer oil is injected or poured out through the oil filling port 4.

[0050] Specifically, one side of the housing 1 is made of a flexible material. Figure 2 The shell 1 includes five equal thickness surfaces and a flexible surface 101, combined with Figure 1 and Figure 3 , the thickness D1 of the equal thickness surface is 0.50mm±0.05m.

[0051] The size of the housing 1 is obtained by equation 1-equation 3:

[0052] M=(Mb+3.0)±0.1 (1)

[0053] N=(Nb+3.0)±0.1 (2)

[0054] K=(Kb+3.0)±0.1 (3)

[0055] Among them, M is the height of the shell 1, N is the width of the shell 1, K is the length of the shell 1, Mb is the height of the outer contour of the transformer component 2, Nb is the width of the outer contour of the transformer component 2, and Kb is the length of the outer contour of the transformer component 2.

[0056] Combination Figure 2 and Figure 3 , the thickness D2 of the flexible surface 101 is obtained by formula 4:

[0057]

[0058] Among them, δ is the maximum convex disturbance, M is the height of the shell 1, K is the length of the shell 1, E is the elastic modulus corresponding to the material, η is the Poisson's ratio corresponding to the material, is the elastic limit strength of the material, and H is the selected value of the size. Among them, E, η and Refer to the material manual or obtain through mechanical properties testing.

[0059] The selected size value H is obtained by formula 5:

[0060] H=max(M,K) (5)

[0061] Wherein, M is the height of the shell 1 , and K is the length of the shell 1 .

[0062] The maximum convex disturbance δ is obtained by equation 6:

[0063]

[0064] Among them, T is the maximum value of the transformer oil temperature increase, V0 is the internal space volume of the oil pillow, α is the linear expansion coefficient of the transformer oil, R is the size limit value, and r is the maximum concave disturbance of the flexible surface.

[0065] The limited dimension value R is obtained by formula 7:

[0066] R=min(M / 2,K / 2) (7)

[0067] Wherein, M is the height of the shell 1 , and K is the length of the shell 1 .

[0068] The internal space volume V0 of the oil pillow is obtained by formula 8:

[0069] V0=0.97×(V1-Vb) (8)

[0070] Wherein, V1 is the total internal space volume of the shell, and Vb is the volume of the transformer assembly.

[0071] The total internal space volume V1 of the shell is obtained by formula 9:

[0072] V1=(M-2×D1)×(N-2×D1)×(K-2×D1) (9)

[0073] Wherein, M is the height of the shell 1, N is the width of the shell 1, K is the length of the shell 1, and D1 is the thickness of the equal thickness surface;

[0074] The volume Vb of the transformer assembly is obtained by formula 10:

[0075] Vb=0.353×Mb×Nb×Kb (6)

[0076] Among them, Mb is the height of the outer contour of the transformer component 2, Nb is the width of the outer contour of the transformer component 2, and Kb is the length of the outer contour of the transformer component 2.

[0077] Taking the outer contour dimensions of the portable DR transformer assembly 2 as Mb=43.0mm, Nb=89.0mm, and Kb=44.5mm as an example, the maximum temperature change of the transformer oil is 57.4°C, the linear expansion coefficient is 0.139 / °C, and the material parameters of the oil pillow shell structure are: elastic modulus E=187.5MPa, Poisson's ratio η=0.31,

[0078] According to the scheme of the present invention:

[0079] The outer contour dimensions can be calculated using equations 1 to 3:

[0080] M=(Mb+3.0)±0.1=46.0±0.1mm;

[0081] N=(Nb+3.0)±0.1=92.0±0.1mm;

[0082] K=(Kb+3.0)±0.1=47.5±0.1mm.

[0083] The thickness D1 of the 5 equal thickness sides is 0.50mm±0.05mm. The maximum convex disturbance δ=1.92mm, the thickness D2 of the flexible side is 0.22mm, and the tolerance is 0.01mm. When the outline dimensions are taken as theoretical values, the volume of the shell structure is approximately M×N×K=201021mm 3 ; Take the density as 5.87gcm 3 , then the weight is 5.87×[2×(M×N+K×N)×0.50+M×K×(0.50+0.22)] / 1000=161.49g.

[0084] According to the diaphragm structure scheme:

[0085] When the cross-sectional height M and the plane length K remain unchanged, the cross-sectional width of the air chamber is about 105.0 mm, and the thickness is 0.50 mm. Then the volume of the shell structure is about M×N'×K=229425 mm 3 ; Its weight is 5.87×[2×(M×N'+K×N')×0.50+M×K×(0.50+0.50)] / 1000=185.71g.

[0086] contrast:

[0087] The cross-sectional width was reduced from 105.0 mm to 92 mm, a reduction of 12.38%;

[0088] The volume of the shell structure is reduced by 229425-201021=28405mm 3 , a decrease of 12.38%;

[0089] The weight of the shell structure is reduced by 185.71-161.49=24.23 g, which is a reduction of about 13.05%.

[0090] When the present invention is working, when the temperature of the transformer oil increases, the transformer oil expands in volume due to thermal expansion and contraction, and the flexible surface 101 deforms and convexly deforms. When the temperature of the transformer oil drops, the flexible surface 101 returns to its original shape, thereby achieving air pressure regulation inside the oil pillow.

[0091] In terms of spatial layout, the present invention solves the problem that the traditional oil pillow is "divided into two" and the size cannot be reduced. In view of the limitation of installation space, the air chamber connected to the ambient atmosphere is reduced or adjusted, and the air is combined with the spatial layout to make the oil and improve the utilization efficiency. In terms of structural design, the problem that the traditional oil pillow shell structure contains the air chamber and the additional weight cannot be reduced is solved. In view of the limitation of structural weight, the thickness and shape of the shell structure are optimized in combination with the reduction or adjustment of the air chamber to meet the functional requirements of storing transformer oil and adapting to temperature increase deformation.

[0092] The invention also discloses a medical DR built-in X-ray generator, which comprises a single-sided flexible oil pillow and an oil tank, wherein the oil pillow is arranged on the oil tank.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A single-sided flexible oil pillow, characterized in that: include: A housing, a transformer assembly disposed in the housing, an electrical interface connected to the transformer assembly, and an oil filling port disposed on the housing, wherein the housing is filled with transformer oil, an end of the electrical interface is disposed outside the housing, and one end of the oil filling port communicates with the outside of the housing and the internal space; One side surface of the housing is made of flexible material.

2. The single-sided flexible oil pillow according to claim 1, characterized in that: The size of the housing is obtained by equation 1-equation 3: M=(Mb+3.0)±0.1 (1) N=(Nb+3.0)±0.1 (2) K=(Kb+3.0)±0.1 (3) Among them, M is the height of the shell, N is the width of the shell, K is the length of the shell, Mb is the height of the outer contour of the transformer assembly, Nb is the width of the outer contour of the transformer assembly, and Kb is the length of the outer contour of the transformer assembly.

3. The single-sided flexible oil pillow according to claim 2, characterized in that: The shell includes five equal thickness surfaces and a flexible surface, and the thickness D1 of the equal thickness surfaces is 0.50 mm ± 0.05m。 4. The single-sided flexible oil pillow according to claim 3 is characterized in that: The thickness D2 of the flexible surface is obtained by formula 4: Among them, δ is the maximum convex disturbance, M is the height of the shell, K is the length of the shell, E is the elastic modulus corresponding to the material, η is the Poisson's ratio corresponding to the material, бs is the elastic limit strength corresponding to the material, and H is the selected value of the size.

5. The single-sided flexible oil pillow according to claim 4, characterized in that: The selected size value H is obtained by formula 5: H=max(M,K) (5) Wherein, M is the height of the shell, and K is the length of the shell.

6. The single-sided flexible oil pillow according to claim 5, characterized in that: The maximum convex disturbance δ is obtained by equation 6: Among them, T is the maximum value of the transformer oil temperature increase, V0 is the internal space volume of the oil pillow, α is the linear expansion coefficient of the transformer oil, R is the size limit value, and r is the maximum concave disturbance of the flexible surface.

7. The single-sided flexible oil pillow according to claim 6, characterized in that: The limited dimension value R is obtained by formula 7: R=min(M / 2,K / 2) (7) Wherein, M is the height of the shell, and K is the length of the shell.

8. The single-sided flexible oil pillow according to claim 7, characterized in that: The internal space volume V0 of the oil pillow is obtained by formula 8: V0=0.97×(V1-Vb) (8) Wherein, V1 is the total internal space volume of the shell, and Vb is the volume of the transformer assembly.

9. The single-sided flexible oil pillow according to claim 8, characterized in that: The total internal space volume V1 of the shell is obtained by formula 9: V1=(M-2×D1)×(N-2×D1)×(K-2×D1) (9) Wherein, M is the height of the shell, N is the width of the shell, K is the length of the shell, and D1 is the thickness of the isothickness surface; The volume Vb of the transformer assembly is obtained by formula 10: Vb=0.353×Mb×Nb×Kb (6) Wherein, Mb is the height of the outer contour of the transformer assembly, Nb is the width of the outer contour of the transformer assembly, and Kb is the length of the outer contour of the transformer assembly.

10. A medical DR built-in X-ray generator, characterized in that: It comprises a single-sided flexible oil pillow and an oil tank as described in any one of claims 1 to 9, wherein the oil pillow is arranged on the oil tank.

Images